Answers
Okay, here we have this:
We need to solve the following equation for n:
[tex]\log _8n=3[/tex]To solve this equation we will pass the logarithm to its exponential form:
[tex]\begin{gathered} n=8^3 \\ n=8\cdot8\cdot8 \\ n=512 \end{gathered}[/tex]Finally we obtain that n=512.
Answer:
n = 512
Step-by-step explanation:
Solving logarithmic equations:Write logarithmic equations to exponential equation.
[tex]\sf \log_8 \ n = 3\\\\\\ 8^3 = n\\\\[/tex]
n = 8 * 8 *8
n = 512
Related Questions
At Orangefield Junior High 40% ofthe seventh graders participate in extra-curricular activities a such as athletics, band, and drama. If there are 80 seventh graders participating in extra-curricular activities how many seventh graders are in the class.
Answers
Answer:
200
Explanation:
To know the total number of graders, we will use the rule of three. Where we know that 40% is equivalent to 80 graders and we want to know how many graders are equivalent to 100%. Then:
40% -------- 80 seventh graders
100% -------- x
Where x is the number of seventh graders in the class.
So, solving for x, we get:
[tex]x=\frac{100\text{ \% }\cdot\text{ 80}}{40\text{ \%}}=200\text{ seventh graders}[/tex]Then, there are 200 seventh graders in the class.
• An ice cube is slowly melting, losing 3cm^3 of water each hour. If it is always a perfect cube, (V=s^3), what is the rate of change of its side length when it has 8 cm^3 of ice left?
Answers
Given:
The volume is decreasing at the rate of 3 cm^3 per hour.
The volume of the left ice is 8 cm^3.
Aim:
We need to find the rate of change of the side of the cube.
Explanation:
Let the length of the cube is denoted as s.
Consider the volume of the cube.
[tex]V=s^3[/tex]Since the volume is decreasing at the rate of 3 cm^3 per hour. we can write,
[tex]\frac{dV}{dt}=-3cm^3\/h[/tex]where t represents time and the negative sign represents decreasing.
Differentiate the volume with respect to s.
[tex]\frac{dV}{ds}=\frac{d}{ds}(s^3)=3s^2[/tex]To find the rate of change of the side length, we use the chain rule.
[tex]\frac{dV}{dt}=\frac{dV}{ds}\frac{ds}{dt}[/tex][tex]\text{ Substitute }\frac{dV}{dt}=-3\text{ and }\frac{dV}{ds}=3s^2\text{ in the equation.}[/tex][tex]-3=\frac{ds}{dt}(3s^2)[/tex][tex]-\frac{3}{3s^2}=\frac{ds}{dt}[/tex][tex]-\frac{1}{s^2}=\frac{ds}{dt}[/tex]Since the left ice is 8 cm ^3.
[tex]V=(s)^3=8[/tex][tex]s^3=2^3[/tex][tex]s=2cm[/tex][tex]Substitute\text{ s =2 in the equation}-\frac{1}{s^2}=\frac{ds}{dt}.[/tex][tex]-\frac{1}{2^2}=\frac{ds}{dt}.[/tex][tex]\frac{ds}{dt}=-\frac{1}{4}[/tex][tex]\frac{ds}{dt}=-0.25cm\text{ per hour}[/tex]Verification:
Let s =2 cm, then the volume is 8cm^3.
Let s =1.75cm, the volume is
Jessica furniture store is trying to figure out if she bought a couch at wholesale price for $113 and she mark up by 45%. what price should she sell the couch
Answers
original price = $113
MArkup = 45% = 45/100 = 0.45 ( decimal form)
Sell price = 113 (1 + 0.45) = 113 * 1.45 = $163.85
Given right triangle ABC with altitude BD drawn to hypotenuse AC. If AB = 6 and AD = 2, what is the length of AC? (Note: the figure is not drawn to scale.) B 6 2 D Answer: Submit Answer
Answers
The first step is to make a sketch of the triangle
The altitude (h= BD) of the triangle divides it into two similar right triangles and the hypothenuse, AC, into two line segments n= AD and m= DC.
The relationship between the altitude and the parts of the hypothenuse follows the ratios:
[tex]\frac{n}{h}=\frac{h}{m}[/tex]So, the first step is to determine the altitude of the triangle. To do so, you have to work with ΔABD, "h" is one of the sides of the triangle. Using the Pythagorean theorem you can determine the measure of the missing side:
[tex]a^2+b^2=c^2[/tex]Write the expression for the missing side:
[tex]\begin{gathered} b^2=c^2-a^2 \\ \sqrt[]{b^2}=\sqrt[]{c^2-a^2} \\ b=\sqrt[]{c^2-a^2} \end{gathered}[/tex]Replace c=6 and a=2
[tex]\begin{gathered} h=\sqrt[]{6^2-2^2} \\ h=\sqrt[]{36-4} \\ h=\sqrt[]{32} \\ h=4\sqrt[]{2} \end{gathered}[/tex]Now that we have determined the value of the altitude, we can calculate the value of m
[tex]\frac{n}{h}=\frac{h}{m}[/tex]Write the expression for m:
-Multiply both sides by m to take it from the denominators place:
[tex]\begin{gathered} m\cdot\frac{n}{h}=m\cdot\frac{h}{m} \\ m\cdot\frac{n}{h}=h \end{gathered}[/tex]-Multiply both sides of the equal sign by the reciprocal of n/h
[tex]\begin{gathered} m(\frac{n}{h}\cdot\frac{h}{n})=h\cdot\frac{h}{n} \\ m=\frac{h\cdot h}{n} \\ m=\frac{h^2}{n} \end{gathered}[/tex]Replace the expression with h=4√2 and n=2 and calculate the value of m
[tex]\begin{gathered} m=\frac{h^2}{n} \\ m=\frac{(4\sqrt[]{2})^2}{2} \\ m=\frac{32}{2} \\ m=16 \end{gathered}[/tex]So DC=m= 16cm and AD=n= 2cm, now you can determine the measure of the hypothenuse:
[tex]\begin{gathered} AC=AD+DC \\ AC=2+16 \\ AC=18 \end{gathered}[/tex]The hypothenuse is AC=18cm
determine the length of the unknown side of the right angle
Answers
We are given the right-angle triangle with two known sides and one unknown side.
We can use the Pythagoras theorem to find the length of the unknown side.
Recall that Pythagoras theorem is given by
[tex]a^2+b^2=c^2[/tex]Where c is the side opposite to the 90° angle.
Let us substitute the given values into the above equation
[tex]a^2+(9)^2=(15)^2[/tex]Simplify the equation
[tex]\begin{gathered} a^2+81=225^{} \\ a^2=225-81 \\ a^2=144 \end{gathered}[/tex]Take the square root on both sides
[tex]\begin{gathered} \sqrt[]{a^2}=\sqrt[]{144} \\ a=12 \end{gathered}[/tex]Therefore, the length of the third side of the right angle tri
Find the circumference with a diameter of 10 feet long. I missed the notes for this section, so I don't know what I'm doing.
Answers
We need to find the circumference using the diameter.
The equation for the circumference is given by:
[tex]C=\pi d[/tex]Where d represents the diameter.
Replace d=10 ft
[tex]\begin{gathered} C=\pi10ft \\ \text{Then, the circumference is:} \\ C=10\pi\text{ }ft \end{gathered}[/tex]F(x) = x^3 + x^2 + 9x + 9 Find all zeros including irrational and/ or complexFactor f completely into linear factors Part of it completed: The zeros are -1, 3i, and -3i
Answers
Given:
[tex]F\left(x\right)=x^3+x^2+9x+9[/tex]To find:
The zeros
Explanation:
Factorizing by grouping method,
[tex]\begin{gathered} F\left(x\right)=x^3+x^2+9x+9 \\ =x^2(x+1)+9(x+1) \\ =(x+1)(x^2+9) \end{gathered}[/tex]The zeros are found by equating the factors with zero.
[tex]\begin{gathered} x+1=0 \\ x=-1 \end{gathered}[/tex]And we have,
[tex]\begin{gathered} x^2+9=0 \\ x^2=-9 \\ x=\pm\sqrt{-9} \\ x=\pm3i \end{gathered}[/tex]So, the zeros are,
[tex]-1,3i,-3i[/tex]Final answer:
The zeros are,
[tex]-1,3i,-3i[/tex]How do I relation in amplitude compared to parent function of sine?How do I describe the relation in period compared to parent function of sine?
Answers
The graph in the figure shows the Smith family's driving plan for their vacation. If they want to stop and eat lunch after they've driven for 4 hours, how far will they have driven by lunchtime?Question 17 options:A) 120 milesB) 90 milesC) 60 milesD) 180 miles
Answers
ANSWER:
A) 120 miles
STEP-BY-STEP EXPLANATION:
We can determine at a distance through the graph, just like this:
This means that at 4 hours they have driven 120 miles.
Therefore, the correct answer is: A) 120 miles
At his new job, Manuel expects to make about $37,850 per year. He is paid bi-weekly. 15% of his gross pay will be withheld for federal income tax, 4% for state income tax and 7.65% for Social Security and Medicare taxes. Calculate his net pay, and how much he will pay in taxes each paycheck. a. Convert the Annual Pay to Biweekly Pay b. How much money will he pay in taxes each paycheck? c. What is the Net Pay (take-home pay)?
Answers
Answer:
(a)$1455.77
(b)$387.97
(c)$1067.80
Explanation:
(a)Manuel's proposed annual income = $37,850
There are 52 weeks in a year, this means that if he is paid bi-weekly (every two weeks), he will receive his salary 26 times a year.
His Biweekly pay will be:
[tex]\begin{gathered} =\frac{37,850}{26} \\ =\$1455.77 \end{gathered}[/tex](b)
Federal Income Tax = 15% of his gross pay
[tex]\begin{gathered} =\frac{15}{100}\times1455.77 \\ Federal\; Income\; Tax=\$218.37 \end{gathered}[/tex]State Income Tax = 4% of his gross pay
[tex]\begin{gathered} =\frac{4}{100}\times1455.77 \\ State\; Income\; Tax=\$58.23 \end{gathered}[/tex]Social Security and Medicare taxes = 7.65% of his gross pay
[tex]\begin{gathered} =\frac{7.65}{100}\times1455.77 \\ =\$111.37 \end{gathered}[/tex]The total taxes paid will be:
[tex]\begin{gathered} Taxes=218.37+58.23+111.37 \\ =\$387.97 \end{gathered}[/tex](c)
Therefore, his net pay (take-home pay) will be:
[tex]\begin{gathered} \text{Net Pay==}1455.77-387.97 \\ =\$1067.80 \end{gathered}[/tex]
Which shows the graph of x - 4y=-4?5O1 2 3 4 5 x433-2+4-5-4-3-2-12-لنا -343-51543212-A
Answers
Explanation
Using a graphing calculator, the graph of x-4y =-4 can be seen below.
perimeter of a square must be greater than 118 inches but less than 156 inches .find the range of the possible side lengths that satisfy these conditions . formula p= 4sput answer in interval notation.
Answers
the perimeter of a square must be greater than 118 inches but less than 156 inches.
Perimeter = 4 side lenght
P = 4 s
118 < 4s < 156
Divide by 4
29.5 < s < 39
(29.5 , 39 )
Consider the equation. y=1/4(x-5)^2-3Vertex (5,-3)The next step in graphing a parabola is to find points that will determine the shape of the curve. Find the point on the graph of this parabola that has the X-coordinates X=3.
Answers
We have the equation:
[tex]y=\frac{1}{4}(x-5)^2-3[/tex]This is a parabola expressed in vertex form, where the vertex is (h,k) = (5,-3).
We have to graph the parabola. To do that we need another point, as we already know the vertex and, therefore, the axis of symmetry (x = 5).
We can find another point by giving a value to x and calculating y.
For example, with x = 3 we get:
[tex]\begin{gathered} y(3)=\frac{1}{4}(3-5)^2-3 \\ y(3)=\frac{1}{4}(-2)^2-3 \\ y(3)=\frac{1}{4}\cdot4-3 \\ y(3)=1-3 \\ y(3)=-2 \end{gathered}[/tex]The point that belongs to the parabola when x = 3 is (3, -2).
Then, we can graph the two points and draw the parabola as:
Because of the symmetry at x = 5, we also know that two units to the right, at x = 7, we will have the same value of y that we have for x = 3.
With at least 3 points, we can graph a parabola.
The actual graph is:
If we want to add more precision to our graph, we can calculate more points that belong to the parabola.
For example, at the other side of the vertex, we can calculate the value of y for x = 6:
[tex]\begin{gathered} y(6)=\frac{1}{4}(6-5)^2-3 \\ y(6)=\frac{1}{4}(1)^2-3^{} \\ y(6)=\frac{1}{4}-3 \\ y(6)=\frac{1}{4}-\frac{12}{4}^{} \\ y(6)=-\frac{11}{4}=-2.75 \end{gathered}[/tex]We can add this to the plot as:
We have to aproximate the position of y as the grid only shows integers and y = -2.75.
Answer:
The points in the parabola are (5,-3), (3,-2) and (6,-2.75). We need at least 3 points to plot a parabola.
Find the number of degrees in the acute angle formed by the intersection of walnut street and elm street
Answers
Given two parallel lines and a transversal
So, the angles (2x + 33) and ( 5x - 15 ) are congruent because they are corresponding angles
So, 5x - 15 = 2x + 33
Solve to find x
[tex]5x-15=2x+33[/tex]Combine like terms:
[tex]\begin{gathered} 5x-2x=33+15 \\ 3x=48 \\ x=\frac{48}{3}=16 \end{gathered}[/tex]So, the required angle = 2x + 33 = 2 * 16 + 33 = 32 + 33 = 65
So, the angle is 65
The Hudson family is saving for a
family vacation to Disney World.
They determine that the trip will
cost $3,200. Mr. and Mrs.
Hudson have already set aside
$1,500 for the trip. If they leave
in 16 weeks, then how much
will they need to save
each week?
Answers
As per the unitary method, they need to save $106.25 each week.
Unitary method:
Basically, the unitary method is a way of finding out the solution of a problem by initially finding out the value of a single unit, and then finding out the essential value by multiplying the single unit value.
Given,
The Hudson family is saving for a family vacation to Disney World. They determine that the trip will cost $3,200. Mr. and Mrs. Hudson have already set aside $1,500 for the trip.
Here we need to find the amount they need to save for each week if they leave in 16 weeks.
While we looking into the given question,
Total amount of Saving = $3,200.
Amount in hand = $1,500
So, the amount need is calculated as,
=> 3200 - 1500
=> 1700
Here we have the 16 week time,
So, the saving for each week is calculated as,
=> 1700/16
=> 106.25
Therefore, the family have to save $106.25 for each week.
To know more about Unitary method here.
https://brainly.com/question/28276953
#SPJ1
A quadrilateral is formed by the points A(1,-1), B(0,3), C(5,5), and D(6, 1). Plot the points and use the distance formula to find the lengths of all 4 sides. What type of quadrilateral is this?
Answers
If we have the given points on a cartesian point, the result would be:
It is not difficult to see that these points will form a rhombus. In this case, we do expect that the opposite sides have the same size. To verify it, we will use the following formula to calculate the distance among the given points:
[tex]d_{P1-P2}=\sqrt[]{(x_1-x_2)^2+(y_1-y_2)^2}[/tex]Substituting each pair, we have:
AB
[tex]\begin{gathered} d_{AB}=\sqrt[]{(1-0)^2+(-1-3)^2}=\sqrt[]{1^2+(-4)^2}=\sqrt[]{1+16}_{} \\ d_{AB}=\sqrt[]{17} \end{gathered}[/tex]BC
[tex]undefined[/tex]3С21In the similaritytransformation of AABCto ADEF, AABC was dilated bya scale factor of [? ], reflectedacross the J, and movedthrough the translation [ ].BА-7-6-5-4m, 002-1 0.12.39ShoesDA. 2B. 1/2C. 3D. 1/3
Answers
Scale factor is the ratio of corresponding sides in two(2) similar geometric figures.
Taking one similar side of the two(2) figures, we have:
[tex]\begin{gathered} \frac{DF}{CA}=\frac{2}{1}=2 \\ \text{Thus, scale factor is 2} \end{gathered}[/tex]Hence, the correct option is option A
It is reflected across the x-axis and moved through the translation (3, 1)
-1/4÷ (x/y) = -1/2what is the missing fraction
Answers
-1/4 / (x/y) = -1/2
Cross fractions
-1/4 / (-1/2) = x/y
-1/4 (-2/1) = x/y
2/4 = x/y
1/2 = x/y
a student's can sit at 1 cafeteria table about how many tables are needed for 231 students explain
Answers
We can solve this question by means of the rule of three:
[tex]\begin{gathered} 1\text{ student ------- 1 table} \\ 231\text{ students ------ x} \end{gathered}[/tex]then, x is given by
[tex]undefined[/tex]I really need help with number 6find the value of x that makes abcd a parallelogram.
Answers
Given:
The adjacent angles of the parallelogram are,
[tex]28,\text{ and }3x[/tex]To find:
The value of x.
Explanation:
We know that,
The sum of the two adjacent angles between the parallel lines is supplementary.
So, we write,
[tex]\begin{gathered} 28+3x=180 \\ 3x=180-28 \\ 3x=152 \\ x=50.66 \\ x\approx50.7 \end{gathered}[/tex]Thus, the value of x is 50.7.
Final answer:
The value of x is 50.7.
1. Use the image below to find the midpoint of segments BD and AC B 5 С D -5 4 3 2 1 1 2 3 4 5 2. Classify triangle ABC as either equilateral, right, isosceles, or none. 5 C B 2 A -3 -2 -1 2 3 4 5 6 -2
Answers
1. We have that B (-2,4) and D (2,1), then the midpoint has coordinates
[tex]\begin{gathered} x=\frac{-2+2}{2}=0 \\ y=\frac{4+1}{2}=\frac{5}{2} \end{gathered}[/tex]and the midpoint is (0,5/2).
On the other hand A (-4,1) and C (4,4), so the midpoint has coordinates
[tex]\begin{gathered} x=\frac{-4+4}{2}=0 \\ y=\frac{1+4}{2}=\frac{5}{2} \end{gathered}[/tex]and the midpoint is (0, 5/2).
In conclusion, the midpoint of segments BD and AC is (0,5/2).
2. To classify the triangle we need to know the length of its sides
[tex]\begin{gathered} \bar{AB}=\sqrt[]{(3-(-2))^2+\mleft(0+2\mright)^2}=\sqrt[]{25+4}=\sqrt[]{29} \\ \bar{BC}=\sqrt[]{(2-(-2))^2+(4-2)^2}=\sqrt[]{16+4}=\sqrt[]{20} \\ \bar{AC}=\sqrt[]{(3-2)^2+(4-0)^2}=\sqrt[]{1+16}=\sqrt[]{17} \end{gathered}[/tex]Since neither of its sides has equal length, then it is not equilateral os isosceles. Besides,
[tex]17^2+20^2\ne29^2[/tex]Then it is not a right triangle.
In conclusion the answer is none of the options
You invested $9000 between two accounts paying 4% and 7% annual interest. If the total interest earned for the year was $510, how much was invested at each rate?
Answers
Let x represent the amount invested at 7%.
Then 9000-x is the amount invested at 4%
total interest earned is:
0.07x + 0.04(9000-x) = 510
0.07x + 360 - 0.04x = 510
0.03x = 150
x = 5000 the amount invested at 7%
9000 - 5000 = 4000 the amount invested at 4%
A mattress with a list price of $2300 will be discounted 30% at the time of purchase. What is the sale price before taxes?
Answers
So,
30% of $2300 is:
[tex]\frac{30\cdot2300}{100}=690[/tex]So that's the amount that will be discounted. Therefore, the sale price before taxes is $2300 - $690 = $1610
Hello I just need the answer for “What is the inverse for the equation y=x^2+16”
Answers
Given:
The given equation is
[tex]y=x^2+16[/tex]Required:
We need to find the inverse for the equation.
Explanation:
[tex]\text{ Let y=f\lparen x\rparen and }x=f^{-1}(y)\text{ and substitute }x=f^{-1}(y)\text{ in the given equation.}[/tex][tex]y=(f^{-1}(y))^2+16[/tex]Substract 16 from both sides of the equation.
[tex]y-16=(f^{-1}(y))^2+16-16[/tex][tex]y-16=(f^{-1}(y))^2[/tex]Take square root on both sides of the equation.
[tex]\pm\sqrt{(y-16)}=f^{-1}(y)[/tex][tex]f^{-1}(y)=\pm\sqrt{(y-16)}[/tex]Replace y=x in the equation.
[tex]f^{-1}(x)=\pm\sqrt{x-16}[/tex]Final answer:
[tex]f^{-1}(x)=\pm\sqrt{x-16}[/tex]A real estate agent believes that most of the home prices are low with few homes have very high prices in a certain area in his county. If his description on home prices in this area is accurate, which of the following shape best describe the distribution of home prices in this area?SymmetricalNormalNegatively skewedPositively skewe
Answers
GIVEN:
We are told that a real estate agent believes that most of the home prices are low with very few homes having very high prices in a certain area.
Required;
If his description is accurate, which shape best describes the distribution of home prices in this area?
Explanation;
For data distribution, the graph can take on different shapes dpending on how the data is distributed. In this particular instance, most of the data is lying on the left side of the graph. In other words, the curve is more elevated on the left side while its very low towards the right side.
The following picture is an illustration of this scenario;
This is "Positively skewed data distribution."
ANSWER:
Positively skewed.
y=1/2x what is the b, or y-intercept in this equation
Answers
The given equation is
[tex]y=\frac{1}{2}x[/tex]The slope-intercept form is
[tex]y=mx+b[/tex]The given equation can be written as follows.
[tex]y=\frac{1}{2}x+0[/tex]Comparing this equation with slope-intercept form, we get b=0.
Hence the value of b or y-intercept in the given equation is 0.
Which of the following are possible sidelengths for a triangle?A. 16, 8, 10B. 4, 12,6C. 6, 9, 17
Answers
Step-by-step explanation:
Triangle rule
a + b > c
This implies that the summation of first and second leg must be greaterthan the third leg
For Option A
a = 16, b = 8, and c = 10
16 + 8 > 10
What is the solution to the equation?3+√3x- 5 = x A. -2 and -7B.2 and 7C. -2D. 7
Answers
Given the equation:
[tex]3+\sqrt[\placeholder{⬚}]{3x-5}=x[/tex]Isolating the square root:
[tex][/tex]Convert from degrees-minutes-seconds to decimal degrees.Round your answer to the nearest thousandth.
Answers
Given:
[tex]25\degree46^{\prime}11^{\prime}^{\prime}[/tex]Required:
To convert the given degrees-minutes-seconds to decimal degrees.
Explanation:
Consider
[tex]25\degree46^{\prime}11^{\prime}^{\prime}[/tex]Now
[tex]\begin{gathered} 11\div3600=0.00305 \\ \\ 46\div60=0.76666 \\ \\ 25\div1=25 \end{gathered}[/tex]Therefore
[tex]\begin{gathered} =25+0.76666+0.00305 \\ =25.76971\degree \end{gathered}[/tex]Final Answer:
[tex][/tex]I need help in math can you please help me please
Answers
Trigonometric Equations
Solve:
[tex]9\tan ^3x=3\tan x[/tex]In the interval [0,2pi)
We have to find all the values of x that make equality stand. First, divide by 3:
[tex]3\tan ^3x=\tan x[/tex]Subtract tan x
[tex]3\tan ^3x-\tan x=0[/tex]Factor tan x out:
[tex]\tan x(3\tan ^2x-1)=0[/tex]One solution comes immediately:
tan x = 0
There are two angles whose tangent is 0:
[tex]x=0\text{ , x=}\pi[/tex]The other solutions come when equating:
[tex]3\tan ^2x-1=0[/tex]Adding 1, and dividing by 3:
[tex]\tan ^2x=\frac{1}{3}[/tex]Taking the square root:
[tex]\tan x=\sqrt[\square]{\frac{1}{3}}=\pm\frac{\sqrt[]{3}}{3}[/tex]The positive answer gives us two solutions:
[tex]\tan x=\frac{\sqrt[]{3}}{3}[/tex]x=pi/6 and x=7pi/6
The negative answer also gives us two solutions:
[tex]\tan x=-\frac{\sqrt[]{3}}{3}[/tex]x=5pi/6, 11pi/6
Summarizing the solutions are:
{