Answer:
To find the total annual interest on Nora's two investments, we need to calculate the interest earned on each investment and then add the two amounts together. To find the interest earned on the first investment, we need to multiply the amount invested by the interest rate and the length of time the investment is held. The investment of $800 is held for one year, so the interest earned on this investment is $800 x 6% x 1 = $48. To find the interest earned on the second investment, we need to use the same formula. The investment of $1200 is also held for one year, so the interest earned on this investment is $1200 x 7% x 1 = $84. The total interest earned on both investments is $48 + $84 = $132. Therefore, Nora's total annual interest on these two investments is $132.
Step-by-step explanation:
help me please and thank you
Answer: A, C, 57
Step-by-step explanation:
I multiply by 0.40 for the first one, and then multiply by 1.0625. 0.40 = 40% and multiplying by 1.0625 is the same as adding 6.25%. For the second, I multiply by 0.70 because that is 70%. For the last, I multiply by 0.95 for the same reason.
a group of scientists discovered a small creature at the bottom of the ocean that they called a "piknit". when this interesting creature dies, it explodes itself into a number of baby piknits called gogles. the scientists randomly selected 20 piknits from the sea-floor and measured their respective weights in grams. after the piknits died they counted the number of gogles that each piknit produced. they wanted to know if the weight of the piknits can be used to predict the number of gogles.
The weight of the piknits can be used to predict the number of gogles as there is Linear equation in variables may be defined as a linear courting among x and y, that is, variables.
In this case, x is the impartial variable, and y relies upon on it, so y is known as the established variables.
linear courting (or linear association) is a statistical time period used to explain a straight-line courting among variables. Linear relationships may be expressed both in a graphical layout or as a mathematical equation of the shape y = mx + b.
"There is no linear relationship between the weight of the and the number of glasses"
"There is a linear relationship.
A. Yes, because the scatterplot shows a linear pattern.
C. Yes, because a random sample was taken from Piknits for the scatterplots of the 4th and 5th residuals is.
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Select that integer that matches the following situation:
I go for a hike in Colorado. The top of the mountain is , feet above sea level.
Question 4 options:
A: 144
B: 14,000
C: -14
D: -14,000
The integer that matches the situation I go for a hike in Colorado. The top of the mountain is feet above sea level is 14000.
What is Number system?A number system is defined as a system of writing to express numbers.
Given,
I go for a hike in Colorado. The top of the mountain is ___ feet above sea level.
We need to find the suitable integer in the blank.
The top of a mountain would be a high number above sea level, 144 is around ground level above sea level therefore the top of the mountain would be 14,000 feet above sea level
Hence, the integer that matches the situation I go for a hike in Colorado. The top of the mountain is feet above sea level is 14000.
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stop the car! a car company has found that the lifetime of its disc brake pads varies from car to car according to a normal distribution with mean m 55,000 miles and standard deviation s 4500 miles. the company installs a new brand of brake pads on an srs of 8 cars. (a) if the new brand has the same lifetime distribution as the previous type of brake pad, what is the sampling distribution of the mean lifetime x? (b) the average life of the pads on these 8 cars turns out to be x 51,800 miles. find the probability that the sample mean lifetime is 51,800 miles or less if the lifetime distribution is unchanged. what conclusion would you draw?
a) The sampling distribution of the mean lifetime x is: Approximately normal with mean 55,000 and standard error 1591.
b) The probability that the sample mean lifetime is 51,800 miles or less if the lifetime distribution is unchanged is of 0.0222 = 2.22%. As the z-score has an absolute value greater than 2, it shows that this is an unusual measure, hence a conclusion could be drawn that there actually were changes in the distribution.
How to obtain probabilities using the normal distribution?The z-score of a measure X of a variable that has mean symbolized by [tex]\mu[/tex] and standard deviation symbolized by [tex]\sigma[/tex] is obtained by the rule presented as follows:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The z-score represents how many standard deviations the measure X is above or below the mean of the distribution, depending if the obtained z-score is positive or negative.Using the z-score table, the p-value associated with the calculated z-score is found, and it represents the percentile of the measure X in the distribution.By the Central Limit Theorem, the sampling distribution of sample means of size n has standard deviation [tex]s = \frac{\sigma}{\sqrt{n}}[/tex]. Additionally, the distribution is approximately normal with the same mean and the population mean.The parameters for this problem are given as follows:
[tex]\mu = 55000, \sigma = 4500, n = 8, s = \frac{4500}{\sqrt{8}} = 1591[/tex]
The probability that the sample mean lifetime is 51,800 miles or less is the p-value of Z when X = 51,800, hence:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
By the Central Limit Theorem
[tex]Z = \frac{X - \mu}{s}[/tex]
Z = (51800 - 5500)/1591
Z = -2.01.
Z = -2.01 has a p-value of 0.0222.
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Plot all of the ordered pairs for the values in the domain. D: {-6, -5, -2, 0, 1}.
The possible ordered pairs set for the values in domain D is {(-6,11),(-5,9),(-2,3),(0,-1),(1,-3)}. The above graph shows the plot of these ordered pairs.
We have given that
y = -2x - 1 --(1)
Domain , D = {-6, -5, -2, 0, 1}
now, we find out the values of y for corresponding to given domain value.
put x = -6 in equation (1)y = -2(-6) -1 = 11
the first ordered pair is (-6,11).
put x = -5 theny = -2(-5) - 1 = 9
The second order pair is (-5,9).
put x = -2 in equation (1)y = -2(-2) - 1 = 3
The third ordered pair is (-2,3).
put x = 0y = 0 -1 = -1
The fourth ordered pair is (0, -1).
put x = 1y = -2(1) - 1 = -3
The fifth ordered pair is ( 1, -3).
Now, we get all the possible ordered pairs from domain for plotting.
We can easily plot these points on 2-D graph taking y values on y-axis and domain points on x-axis.
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Complete question:
Use the drawing tools to form the correct answers on the graph. Consider this linear function: y = -2x - 1
Plot all of the ordered pairs for the values in the domain. D: {-6, -5, -2, 0, 1} Drawing Tools Click on a tool to begin drawing. (Plato)
a² + 11a + 30
Plsss help
Answer:
( a + 5 ) ( a + 6 )
? maybe
Step-by-step explanation:
I really don't know how to explain
gwen is interested in the effect of bananas on the speed and endurance of high school cheerleaders. she recruits 20 cheerleaders from high schools in california. each cheerleader was asked to run as many laps as they could in 20 minutes on a standard 100m track. two weeks later the same cheerleaders were asked to run as many laps as they could in 20 minutes, but were asked to eat a banana 10 minutes prior to starting. the number of laps completed (to the nearest quarter lap) was recorded. what is the sample of this study?
Therefore the answer to the problem is that the sample taken for study is 20 cheerleaders .
What is sample?A sample is a condensed, controllable representation of a larger group. It is a subgroup of people with traits from a wider population. When population sizes are too big for the test to include all potential participants or observations, samples are utilized in statistical testing.
Here,
The sample of this study is the 20 cheerleaders which are taken for study.
Explanation: As the study of banana effect on speed and endurance of high school cheerleaders is been studied on the 20 selected cheerleaders from high schools in california so, as they are only 20 cheerleaders not all cheerleaders from california thus, the sample available is 20 cheerleaders so answer of sample becomes 20 cheerleaders.
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what is the answer to 17 divided by 1699
The answer is 99 and the remainder is 16
in how many ways can a committee of two democrats and three republicans be formed from a froup of eight democrats and eleven republicans
the total way the committee formed is 3080.
What is combination?
A combination is a choice made in mathematics from a group of different elements when the order of the choices is irrelevant (unlike permutations). For instance, if three fruits, such as an apple, an orange, and a pear, are supplied, there are three possible pairings of the two: an apple and a pear. Formally speaking, a k-combination of a set S is a subset of S's k unique components. In other words, two combinations are the same if and only if they have the same members. (It is not important how the individuals in each set are arranged.) The quantity of k-combinations for a set with n components
The available candidates from a group are 8 Democrats and 11 Republicans.
Three Democrats and two Republicans must be included on the committee that we choose.
Thus, from a pool of 11 Republicans and 8 Democrats, we must select 3 each.
Both 8C3 and 11C2 approaches are viable for achieving this.
8C3 * 11C2 = 3080 are the total ways to form this committee.
Hence the total way the committee formed is 3080.
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Can we construct a quadrilateral when its four sides and one diagonal is given *?
Yes, construction of a quadrilateral is possible when the four sides and one of the diagonal of the quadrilateral is given.
Step by Step explanation:
Steps of constructions of a quadrilateral with four given sides and one given diagonal is as follow :
Draw a ray AB and take 'A' as center and mark an arc on AB with the given measurement and name it B.Now through center A mark an arc of diagonal measurement.Take B as center and intersect the arc of diagonal by another arc of measure BC.Name intersecting point of diagonal and side BC as point C.Take 'C' as center and cut an arc of measure CD.Take 'A' as center and cut an arc of measure AD.Join AB, BC, CD, DA and diagonal AC.Therefore, construction of quadrilateral is possible with four sides and given diagonal.
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6. 42.3 × 1 =
42.3 x 10 =
42.3 × 10²
Answer:
Step-by-step explanation:
42.3 x 1 = 42.3
42.3 x 10= 423
42.3 x 10^2=
10 x 10 =100
42.3 x 100=4230
a force of 6 pounds compresses a 16-inch spring 4 inches. how much work is done in compressing the spring from a length of 10 inches to a length of 5 inches?
The amount of work done in compressing the spring from a length of 10 inches to a length of 5 inches is 63.75 in-lb .
In the question ,
it is given that ,
a force of 6 pounds compresses a 16-inch spring 4 inches ;
we know that F = k*x
So , 6 = k*4
k = 6/4 lb/inch .
Work done in compressing spring from 10 inches to 5 inches is
W = ∫₆¹¹ kx dx .
W = k[x²/2]₆¹¹ = (k/2)*[121 - 36] = 85k/2 .
Substituting the value of k = 6/4 , we get
the Work Done is = 85/2 × 6/4 = 63.75 in-lb .
Therefore , the work done in compression is 63.75 in-lb .
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The margin of error of a confidence interval is the error from biased sampling methods.a. trueb. false
Margin of error is statistical expressing the amount of a random sampling error in survay results not the error term from biased sampling method. So, correct answer is False.
What is Margin of error ?Margin of error in statistics represents the amount of random sampling error in the survey results. The larger the margin of error, the less confident that the survey results reflect the results of the census of the entire population. It is denoted by E or MOE. It is calculated by dividing the square root of the sample size by the standard deviation of the population. 99% level is the most conservative, 90% level is the least conservative. The sampling error is a statistical error that occurs when the analyst does not select a sample that is representative of the entire data population.
False - Margin of error only account for sample variability (the fact that my sample differs from many others' samples and therefore provides different statistics.
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question 31 pts a fair six-sided die is tossed 300 times. find the expected value of the sample mean of the values obtained in these 300 tosses (write it up to first decimal place).
The expected value of the sample mean of the values obtained in these 300 tosses is 3.5
Given :
A fair six sided die is tossed 300 times
We have to find the expected value of the sample mean of the values obtained in these 300 tosses.
A dice have six sides:
In a fair dice every side has equal chance of occurrence,
Now the probability of presence of each side = 1/6
Now the expected value of the sample mean of the values obtained in these 300 tosses is given by:
E(x) = Σx P(x =x)
= 1*1/6 + 2*1/6 + 3*1/6 + 4*1/6 + 5*1/6 + 6*1/6
= 1/6 + 2/6 + 3/6 + 4/6 + 5/6 + 6/6
= 1/6 (1+2+3+4+5+6)
= 1/6 (21)
= 21/6
E(x) = 3.5
Hence, the expected value of the sample mean of the values obtained in these 300 tosses is 3.5
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Arianna wants to start her beautician career in a reputable salon. She must pay $350 per month to rent her station space, $85 per month for the shared salon products and $182 start-up styling kit. Arianna has $623 in her savings account. How much will be left in her savings account after she pays for the above expenses?
Responses
$6
$6
$617
$617
$706
$706
$1240
Answer:
$6
Step-by-step explanation:
A chool i arranging a field trip to the zoo. The chool pend 778. 88 dollar on pae for 28 tudent and 4 teacher. The chool alo pend 241. 64 dollar on lunch for jut the tudent. How much money wa pent on a pa and lunch for each tudent?
$24.34 on each student on pae and $7.55125 is spent on each student on lunch.
What is money in simple words?Money is a good that is widely acknowledged as a means of economic exchange.
How do you solve money in math?Word problems in math with moneyDetermine what the word puzzle is trying to say.Make a note of the question's essential phrases.Using the information provided in the problem, write the equation.Use the appropriate operation to solve the equation and arrive at the answer.Verify your efforts, then analyze the response.
there are 32 people all together in a field trip to the zoo
so therefore;
Amount spent on a student for pae:
$778.88=32 people
x = 1 person
cross multiply
32x=$778.88
divide both sides by 32
x=778.88/32
x=$24.34
therefore $24.34 is spent on each student on pae
Amount spent on a student for lunch:
$241.64=32 people
x = 1 person
cross multiply
32x=$241.64
divide both sides by 32
x=$241.64/32
x=$7.55125
therefore $7.55125 is spent on each student on lunch.
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1. do you think that a sample of 800 residents of a city with a population of 150, 000 is a large enough sample to analyze the voting habits of all residents? you know that those 800 people all answered a phone survey administered via a landline. i am concerned about selection bias, representativeness of the sample, and external validity of the study. do you think my concerns are valid? can you offer solutions that would allow me to work with the data set and not go out and survey additional residents?
The sample of 800 residents to analyze the voting habit is not large enough because there can be a selection bias the solution is explained below.
In the question ,
it is given that ,
a sample of 800 residents of a city is taken to analyze the voting habits of all the residents ,
the population of the city is given as 150000 residents ,
In general, a sample of 800 people in a city of 150,000 is not large enough to analyze the voting habits. With the given sample size, there is a high chance that we will miss out to analyze many people with different voting habits.
If the margin of error in analyzing the voting habits is very large , then only we can consider a sample of 800 people.
Therefore , the sample of 800residents can only be considered if the margin of error is very high .
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What is the perimeter of figure I?
In geometry, the perimeter is the overall length of a shape's boundary. The perimeter of a shape is determined by adding the lengths of all of its edges and sides. 28 units make up Figure I's perimeter.
Its dimensions are expressed in linear units like centimetres, metres, inches, and feet. A rectangle in Figure I has four sides that are 8 units, 6 units, 6 units, and 8 units in length. You must total the lengths of all four sides in order to get a rectangle's perimeter. Figure I's perimeter is 8 + 6 + 6 + 8 units, or 28 units.
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What is the equation of the straight line which passes through the point 1/2 and cuts off equal intercepts from the axes?
The equation of the line passing through the point (1, -2) and cutting off equal intercepts from the axes will be x + y +1 = 0.
The equation of the line in the intercept form is expressed as
x/a + y/b = 1
where a is x intercept, b is y intercept and x and y are independent and dependent variables respectively.
Now, according to the question both the intercepts are equal that is
a = b
So, the equation will become
x/a + y/a = 1
x + y = a
Now, since the line passes through (1, -2), so
1 + (-2) = a
=> a = -1
So, the equation of line will be
x + y = -1 or x + y +1 = 0.
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Complete Question:
What is the equation of the straight line which passes through the point (1, -2) and cuts off equal intercepts from the axes?
PLEASE ANSWER BOTH CORECTLY
The values of x in the cyclic quadrilateral are 6.67 and 25 and the angle
m∠ ACB is 115°
Cyclic QuadrilateralA cyclic quadrilateral is a quadrilateral which has all its four vertices lying on a circle. It is also sometimes called inscribed quadrilateral. The circle which consists of all the vertices of any polygon on its circumference is known as the circumcircle.
1)
To find the value of x
12/8 = 10 / x
x = 20 / 3
x = 6.67
2) To find x;
(4x + 15)° + (6x + 3)° + 92° = 360°
Sum of angles in a circle is 360°
4x + 15 + 6x + 3 + 92 = 360
10x + 110 = 360
10x = 250
x = 25
The value of m ∠ACB in the quadrilateral = 4x + 15
m∠ ACB = 4(25) + 15
m ∠ ACB = 115°
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The equation for line c can be written as y= 3 4 x–2. Line d, which is perpendicular to line c, includes the point (6, – 3). What is the equation of line d?
The equation of line d is perpendicular to line c is y=-4/3 x+5.
The equation of line is y=3/4 x-2.
What is slope of a line?The increase divided by the run, or the ratio of the rise to the run, is known as the line's slope. In the coordinate plane, it describes the slope of the line.
In the equation of line is y=3/4 x-2, slope=m=3/4
The slope of a line perpendicular to given line is m1=-1/m2
So, the slope of a perpendicular line is -4/3
Substitute m=-4/3 and (x, y)=(6, -3) in y=mx+c, we get
-3=-4/3 (6)+c
⇒ -3=-8+c
⇒ c=5
Now, substitute m=-4/3 and c=5 in y=mx+c, we get
y=-4/3 x+5
Therefore, the equation of line d is perpendicular to line c is y=-4/3 x+5.
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a speed walker covered 4 1/2mi in 3/4 hour how far will he walk in 3/4 hour if he walks twice as fast
To find the speed of the walker, divide distance by time.
Distance = 4.5 miles
Time = 0.75 hours
Speed = 4.5/0.75
Speed = 6 mph
If walking twice as fast, speed = 12 mph
Distance given speed and time is time multiplied by speed
0.75 * 12 = 9 miles.
Hope this helps :)
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- Jeron
What is the opposite of point C on the number line?
Question 1 options:
A: -8
B: -4
C: 14
D: 4
Its -14 :>
Randoml spam letters bc it asked me to
Answer:
D
Step-by-step explanation:
C is the point - 4
the opposite of a number is its negative , that is
- (- 4) = + 4
the opposite of point C is therefore 4
What is the slope of the line that passes through the points (9, 1) and (10, -1)?
Write your answer in simplest form.
Answer: 81.9 ??
Step-by-step explanation:
i have pieces of strawberry candy (all identical) and pieces of rhubarb candy (all identical). find the number of ways i can distribute this candy to children, if it's ok to not give a child any candy.
If there are 8 pieces of strawberry candy and 7 pieces of rhubarb candy then I have 77 different methods to give this candy to kids who have donated $5.
Number of strawberry candy = 8 pieces
Number of rhubarb candy = 7 pieces
Find the number of ways for equally distributing candy to all 5 children
Using formula:
→ ⁿCr = n!/r(n-r)!
= 8!/5!3!
= 8×7×6×5!/5! 3 × 2 ×1
= 8×7×6/6
= 56
Calculating the distributing way to rhubarb candy:
→ ⁿCr = n!/r(n-r)!
= 7!/5!2!
= 7×6×5!/5! × 2 ×1
= 7×6/2
= 21
Adding both distributing ways:
56+21 = 77 ways
Hence we get the required answer.
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Your question is incomplete. Please find the missing content below.
I have $8$ pieces of strawberry candy (all identical) and $7$ pieces of rhubarb candy (all identical). Find the number of ways I can distribute this candy to $5$ children.
Is 1 square or prime?
The number 1 is a square number but not a prime number.
Any integer with the notation n×n or n² is referred to as a square number. When a number is multiplied by itself, the outcome is a square number. Here, 1 is a square number because 1×1=1 is the number itself.
Prime numbers are those that have just two elements, one and themselves. They are natural numbers bigger than one that is not the sum of two smaller natural numbers. Here, 1 is not a prime number because they have only one factor which is 1, not two factors.
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Solve for X in Circle A
The value of x, if In triangle ABC, AC = 18, BC = 30 is 24.
What is circle?A circle is a two-dimensional object made up of points that are spaced out from a given point (center) on the plane by a fixed or constant distance (radius).
Given:
In triangle ABC, AC = 18, BC = 30
As we know, if a tangent is drawn from the circle then it will form a right-angled triangle thus, ∠ ABC = 90°,
Calculate the value of x by using Pythagoras' theorem as shown below,
[tex]x^2 = BC^2 - AC^2[/tex]
x² = 30² - 18²
x = √(900 - 324)
x = √576
x = 24
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10% of the items collected by the Hurricane Relief Foundation were blankets. If they
collected 20 blankets, how many items did the Hurricane Relief Foundation collect in all
The total number of items collected for relief is 200.
How to write a linear equation?In order to write a linear equation first find the quantity of which the value is not given. Then, relate the value of this quantity with all the known values to form an equation.
Suppose the number of relief items are x.
The following equation can be written according to the problem,
10% of x = 20
=> 10/100 × x = 20
=> x = (20 × 100)/10
=> x = 200
Hence, the items collected by Hurricane Relief Foundation is given as 200.
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The base of a triangle is decreasing at a rate of 131313 millimeters per minute and the height of the triangle is increasing at a rate of 666 millimeters per minute. At a certain instant, the base is 555 millimeters and the height is 111 millimeter. What is the rate of change of the area of the triangle at that instant (in square millimeters per minute)?.
The rate of change of the area of the triangle at that instant is 8.5 square mm per minute.
A' = (1/2)(b'h +bh') . differentiating with respect to time
A' = (1/2)((-13)(1) +(5)(6)) = (1/2)(17) = 8.5 . . . . mm²/min
The area is increasing at the rate of 8.5 mm²/min.
Solution based on numbers
Take a look at the triangle dimensions.
01 minute before and 01 minutes after the moment of interest Previously, the base was 5 + 0.13 = 5.13 mm, while the height was 1 - 0.06 = 0.94 mm. After: base = 5 -0.13 = 4.87 mm; height = 1 +.06 = 1.06 mm; area = 2.4111 mm2. 2.5811 mm2 area
The average rate of change throughout that time period is (2.5811 -2.4111)/0.02 =.17/.02 = 8.5... mm2/min.
It should be noted that we assumed the base is dropping at a rate of 13 mm/min. We're not sure whether this isn't 1/3 mm/min because division bars frequently get lost on Brainly. At the anticipated pace, the triangle will vanish in 5/13 minutes, or around 23.08 seconds, when the base reaches zero. Of course, it only existed for 1/6 minute (10 seconds) when the height reached non-zero.
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a manager wants to build 3-sigma x-bar control limits for a process. the target value for the mean of the process is 50 units, and the standard deviation of the process is 8. if samples of size 16 are to be taken, what will be the upper and lower control limits, respectively?
The upper limit and lower control limits will be 56 and 44 respectively.
What is statistical process control ?
When the process is under control, there will be a high possibility that the value of the sample mean will fall between the two control limits, which is why the lower line, also known as the lower control limit, was chosen.
Mean = 50
Sample size = 16
Standard deviation = 8
We need to find the upper and lower control limits.
So, Lower limit would be
= x - 3×σ÷
= 50 - 3×8÷
= 50 - 3×2
= 50 - 6
= 44
Upper limit would be
= x + 3×σ÷
= 50 + 3×8÷
= 50 + 3×2
= 50 + 6
= 56
The upper and lower control limits of process will be 56 and 44 respectively
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