The given function is expressed as
f(x) = (20 + x)/5
We want to find f(- 9). To do this, we would substitute x = - 9 into the function. It becomes
f(- 9) = (20 + - 9)/5 = (20 - 9)/5
f(- 9) = 11/5
Can you please help me
The figure given is a sphere
A surface area of a sphere is given by
[tex]A=4\pi r^2[/tex]The diameter of the sphere is given to be 42 cm
The radius of the sphere is half the diameter =
[tex]r=\frac{42}{2}=21\operatorname{cm}[/tex]Substituting the value of r into the formula
[tex]\begin{gathered} A=4\times\pi\times21^2 \\ A=5541.8\operatorname{cm}^2 \end{gathered}[/tex]The correct answer is option A
A boat is heading towards a lighthouse, whose beacon-light is 108 feet above the water. From pointA, the boat’s crew measures the angle of elevation to the beacon, 8 degrees, before they draw closer. They measure the angle of elevation a second time from pointB at some later time to be 16∘. Find the distance from point A to point B. Round your answer to the nearest foot if necessary.
Given: The information of a boat heading towards a lighthouse
To Determine: The distance from point A to point B
Solution: The information provided can be translated into the diagram below
[tex]\begin{gathered} m\angle ADC+m\angle DAC=90^0 \\ m\angle ADC+8^0=90^0 \\ m\angle ADC=90^0-8^0 \\ n\angle ADC=82^0 \end{gathered}[/tex][tex]\begin{gathered} m\angle BDC+m\angle DBC=90^0 \\ m\angle BDC=90^0-m\angle DBC \\ m\angle BDC=90^0-16^0 \\ m\angle BDC=74^0 \end{gathered}[/tex]Using SOH CAH TOA
[tex]\begin{gathered} \tan 74^0=\frac{BC}{108} \\ BC=108\tan 74^0 \\ BC=108\times3.4874 \\ BC=376.64ft \\ BC\approx377ft(nearest\text{ foot)} \end{gathered}[/tex][tex]\begin{gathered} \tan 82^0=\frac{AC}{108} \\ AC=108\times\tan 108 \\ AC=108\times7.115 \\ AC=768.4599 \end{gathered}[/tex][tex]\begin{gathered} AB=AC-BC \\ AB=768.45993-376.64 \\ AB=391.8199 \\ AB\approx392ft \end{gathered}[/tex]Hence, the distance from point A to point B is 392ft (nearest foot)
Elan is painting the outside of a rectangular barn door. It is 80 inches high and 60 inches wide. What is the area of the outside door?
Draw the barn dorr
the area of a rectangle is
[tex]A=h\times w[/tex]where h is height and w the width
the replacing
[tex]\begin{gathered} A=80\times60 \\ A=4800 \end{gathered}[/tex]then area of outside dor is 4800 square inches
Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 15 (as on the Wechsler test). Find the probability that 2 - a randomly selected adult has an IQ between 100 and 120?
ANSWER
[tex]\begin{equation*} 0.40824 \end{equation*}[/tex]EXPLANATION
We want to find the probability that a randomly selected adult has an IQ between 100 and 120.
To do this, first, we have to find the z-score for 100 and 120 using the formula:
[tex]z=\frac{x-\mu}{\sigma}[/tex]where x = IQ score
σ = standard deviation
μ = mean
Hence, for an IQ score of 100, the z-score is:
[tex]\begin{gathered} z=\frac{100-100}{15}=\frac{0}{15} \\ z=0 \end{gathered}[/tex]For an IQ score of 120, the z-score is:
[tex]\begin{gathered} z=\frac{120-100}{15}=\frac{20}{15} \\ z=1.33 \end{gathered}[/tex]Now, to find the probability of an IQ score between 100 and 120, apply the formula:
[tex]\begin{gathered} P(100Using the standard normal table, we have that:[tex]\begin{gathered} P(z<1.33)=0.90824 \\ P(z<0)=0.5 \end{gathered}[/tex]Therefore, the probability is:
[tex]\begin{gathered} P(0That is the answer.Determine the angle measures of quadrilateral EFGH that would result in it's similarity to quadrilateral ABCD
Solution:
If two angles of a triangle have measures equal to the measures of two angles of another triangle, then the triangles are similar. Corresponding sides of similar polygons are in proportion, and corresponding angles of similar polygons have the same measure. Two congruent shapes are similar, with a scale factor of 1.
Similarity statement:
In geometry, it states that two sides are similar if they have the same side ratio and the same angles
From the image in the question,
The quadrilateral ABCD has the following angles
[tex]\begin{gathered} m\angle A=90^0 \\ m\angle B=132^0 \\ m\angle C=73^0 \\ m\angle D=65^0 \end{gathered}[/tex]From the similarity statement above,we can deduce that
[tex]undefined[/tex]Illustrate each of the following diagram:TRY HARDERNeed rn asap :)
We will draw the Venn diagram to show the universal st U and the 3 sets A, B, C
Now we will start with the common elements of A and B
5 is the common element of A and B
1 is the common element between A and C
2, 4, and 6 are the common elements between B and C
3 is in A only
Now we can answer the question using the Venn diagram
1. A' means all the elements in U except A, then
[tex]A^{\prime}=\lbrace2,4,6\rbrace[/tex]2. B U C means all elements in B and C
[tex]B\cup C=\lbrace1,2,4,5,6\rbrace[/tex]3. A intersect C means common elements in A and C
[tex]A\cap C=\lbrace1\rbrace[/tex]4. B' all elements in U not in B
[tex]B^{\prime}=\lbrace1,3\rbrace[/tex]5. A U B all elements in A and B
[tex]A\cup B=\lbrace1,2,3,4,5,6\rbrace[/tex]a. (A U C}' means all elements in U except A and C
[tex](A\cup C)^{\prime}=\lbrace\rbrace=\Phi[/tex]Empty set because all elements are in A and C
b. A' intersects C'
[tex]\begin{gathered} A^{\prime}=\lbrace2,4,6),C^{\prime}=\lbrace3,5\rbrace \\ A^{\prime}\cap C^{\prime}=\lbrace\rbrace=\Phi \end{gathered}[/tex]No common elements between A' and C'
c. (A intersects B)' means all elements in U except the common elements between A and B
[tex]\begin{gathered} A\cap B=\lbrace5\rbrace \\ \\ (A\cap B)^{\prime}=\lbrace1,2,3,4,6\rbrace \end{gathered}[/tex]What change do you have to make to the graph?
EXPLANATION:
Given;
We are given the function below;
[tex]f(x)=3^x[/tex]Required;
We are required to describe what change would be made to graph the function;
[tex]g(x)=3^{x-7}[/tex]For a function given such as the one here, when the graph is shifted to the right, then the original function is affected as follows;
[tex]\begin{gathered} f(x)=x \\ \\ Shift\text{ }to\text{ }the\text{ }right: \\ f(x)+(x)=x \\ \\ Subtract\text{ }(x)\text{ }from\text{ }both\text{ }sides: \\ f(x)+(x)-(x)=x-(x) \\ \\ f(x)=x-(x) \end{gathered}[/tex]For a shift to the left, we would have a plus sign, that is, add x number of units the graph is being shifted.
Therefore, for a function that has changed such as the one given,
[tex]g(x)=3^{x-7}[/tex]What we have is shift the original graph 7 units to the right.
ANSWER:
[tex]Shift\text{ }the\text{ }graph\text{ }7\text{ }units\text{ }right[/tex]The first option is the correct answer.
The midpoint of a segment can be found using the formulas for a directed line segment, x =C DaQ+bX2-X1) + X, and46]«y =aa + b-6/2 – Yı) + y1. When using these formulas to find a midpoint, which is true?O a = 1 and b= 2a = 2 and b = 1a = 1 and a + b = 2a = 2 and a + b = 2NextSubmitSave and ExitMark this and return
In general, the formula to find the midpoint of a line segment which ends have the coordinates (x₁,y₁) and (x₂,y₂) is given by
[tex]M=(\frac{x_2+x_1}{2},\frac{y_2+y_1}{2})[/tex]Working with the formula we are given, for the x coordinate of the midpoint we have:
[tex]x=(\frac{a}{a+b})(x_2-x_1)+x_1=\frac{a(x_2-x_1)}{a+b}+\frac{(a+b)x_1}{a+b}[/tex]In order for this to be like the previous formula, we have the following equation:
[tex]\frac{a(x_2-x_1)}{a+b}+\frac{(a+b)x_1}{a+b}=\frac{x_2+x_1}{2}[/tex]From here, we see that a+b must be equal to 2, so:
[tex]\frac{a(x_2-x_1)}{2}+\frac{2x_1_{}}{2}=\frac{ax_2-ax_1}{2}+\frac{2x_1}{2}=\frac{ax_2-ax_1+2x_1}{2}=\frac{x_2+x_1}{2}[/tex]In order for this last equation to be true, a must equal 1:
[tex]\frac{x_2-x_1+2x_1}{2}=\frac{x_2+x_1}{2}[/tex]Let's verify this with the formula for the y coordinate of the midpoint:
[tex](\frac{1}{2})(y_2-y_1)+y_1=\frac{y_2-y_1}{2}+y_1=\frac{y_2-y_1}{2}+\frac{2y_1}{2}=\frac{y_2-y_1+2y_1}{2}=\frac{y_2+y_1}{2}[/tex]Since using our previous deduction leads us to the correct formula for the y coordinate of the midpoint as well, we can conclude that a=1 and a+b=2.
Consider the right triangle with leg lengths of 5 and 12 units shown in the image below. One vertex of the triangle is located at (-6, 4).
Step 1
Define the equation of a circle
[tex]\text{The equation of a circle = (x-h)}^2+(y-k)^2=r^2[/tex]Step 2
Write down the parameters
r = radius = ?
h = -6
k = 4
Step 3
find the radius
Considering the triangle we can find the radius using the Pythagoras theorem
[tex]r^2=5^2+12^2[/tex][tex]\begin{gathered} r\text{ = }\sqrt[\square]{25\text{ + 144}} \\ r\text{ = }\sqrt[]{169} \\ r\text{ = 13} \end{gathered}[/tex]Step 3
Substitute the values into the equation and simplify
[tex]\begin{gathered} (x-(-6))^2+(y-4)^2=13^2 \\ (x+6)^2+(y-4)^2=13^2 \end{gathered}[/tex]Answer is option A
Mr. Nguyen bought a suit that was on sale for 40% off the original price. He paid 9% salea tax on the sake price. The original price of the suit was $260. How much did he pay for the suit, including tax, to the nearest dollar?
The original price of the suit was $260. If the sale price was 40% off the original price, it means that the amount of discount was
40/100 * 260 = 104
The sale price is 260 - 104 = $156
If he paid sales tax of 9% of the sale price, it means that the amount of tax is
9/100 * 156 = 14.04
Therefore, the amount that he paid including tax is
156 + 14.04 = $170.04
Rounding up to the nearest dollar, the amount is $170
Find the odds in favor of getting an extra turnWhat is the probability of choosing a lemon-flavored piece
Given:
Probability of few cases is given
Required:
I would appreciate your feedback - you can provide it by rating the session.
Explanation:
(a)
[tex]\begin{gathered} the\text{ odds in favor of getting an extra turn=} \\ \\ =\frac{probability\text{ of chances to get an extra turn in 17 attempts}}{probability\text{ of chance to not get an extra turn in 17 attempts}} \\ \\ =\frac{6}{17-6}\text{ =}\frac{6}{11} \end{gathered}[/tex](b) Odds against is given by number of failures/number of successes
[tex]\begin{gathered} \frac{no\text{ of failures }}{no\text{ of success}}=\frac{9}{10} \\ \\ The\text{ total number of trials in failures+number of successes= 9+10=19} \\ \\ So\text{ getting a lamon-flavored piece is a success.} \\ \\ p(getting\text{ a lamon flavoured piece\rparen=}\frac{10}{19} \end{gathered}[/tex]Required answer:
[tex](a)\frac{6}{11}\text{ \lparen b\rparen}\frac{10}{19}[/tex]Find the next three terms of the arithmetic sequence. 3/5, 7/10, 4/5,...
Answer:
[tex]\frac{9}{10},1\text{ and 1}\frac{1}{10}[/tex]Explanation:
Given the arithmetic sequence
[tex]\frac{3}{5},\frac{7}{10},\frac{4}{5}\text{.}\cdots[/tex]We can rewrite all the fractions using a denominator of 10 as follows:
[tex]\begin{gathered} \frac{3\times2}{5\times2},\frac{7}{10},\frac{4\times2}{5\times2},\cdots \\ =\frac{6}{10},\frac{7}{10},\frac{8}{10},\cdots \end{gathered}[/tex]We observe that the denominator remains the same but the numerator increases by 1.
Therefore, the next three terms of the arithmetic sequence are:
[tex]\begin{gathered} \frac{9}{10},\frac{10}{10}\text{ and }\frac{11}{10} \\ =\frac{9}{10},1\text{ and 1}\frac{1}{10} \end{gathered}[/tex]Two girls 21 miles apart. One going 3.5 mph one going 2.5 mph. How long until they meet up?
From the picture,
x + y = 21
From definition,
speed = distance/time
The girl whose speed is 3.5 mph, walks x miles in t hours, that is:
3.5 = x/t
or
x = 3.5t
Similarly,
y = 2.5t
(they walk for the same time)
Replacing into the first equation:
3.5t + 2.5t = 21
6t = 21
t = 21/6
t = 3.5
It will take 3.5 hours until they meet up
I need help in this math assignment thank you! :)
Answer: l = 25g
Explanation:
From the information given,
He ties 25 inches of ribbon around each gift.
(g) represents the number of gifts and (r) represents the length of ribbon used. This means that the length of ribbon tied around g gifts is 25g. Thus, the function representing the relationship between the length of ribbon and the number of gifts is
l = 25g
A bicycle has a listed price of $521.99 before tax. If the sales tax rate is 7.5%, find the total cost of the bicycle with sales tax included.Round your answer to the nearest cent, as necessary.
Total cost of the bicycle with sales tax included = $561.14
STEP - BY - STEP EXPLANATION
What to find?
The total cost of the bicycle with sales tax included.
Given:
Price of bicycle before tax = $521.99
Tax rate = 7.5%
To solve the given problrm, we will follow the steps below:
Step 1
Calculate the amount of the tax rate.
[tex]\text{amount of tax rate =}\frac{7.5}{100}\times521.99[/tex][tex]=\frac{3914.925}{100}[/tex][tex]=39.14925[/tex]Step 2
Add the amount of tax obtained in step 1 to the price of bicycle before tax.
[tex]\text{Total tax =price of bicycle before tax+tax}[/tex][tex]=521.99+39.14925[/tex][tex]\approx561.14[/tex]Therefore, the total cost of the bicycle with sales tax included is $561.14
What represents the values of the range in the following graph?A.the range is represented by the average growth of the horse. B. The range is represented by cm/year.C. The range is represented by the height of the horse.D. The range is represented by the age.
The range is the set of possible output values, which are shown on the y-axis.
As shown in the graph, the range is represented by the average growth of the horse.
Therefore, the answer is letter A.
Answer:
A.the range is represented by the average growth of the horse.
Step-by-step explanation:
Containers R Us purchased 5 dozen work gloves for $73.80. How much did each pair of gloves cost?
In order to determine the price of each pair, just calculate the quotient in between the total price and the number of dozen works, which were 5:
73.80/5 = 14.76
Hence, each pair of dozen work costed $14.76
I have a picture because it has a diagram
In a parallelogram, two adjacent sides are 2.c – 7 and 3x – 6. If the perimeter of the parallelogram is 34, find x and the shorter side of the parallelogram X= Shorter Side =
Given the information on the problem, we have the following parallelogram:
since the perimeter is 34, we can write the following equation:
[tex]2(3x-6)+2(2x-7)=34[/tex]solving for x, we get:
[tex]\begin{gathered} 2(3x-6)+2(2x-7)=34 \\ \Rightarrow6x-12+4x-14=34 \\ \Rightarrow10x-26=34 \\ \Rightarrow10x=34+26=60 \\ \Rightarrow x=\frac{60}{10}=6 \\ x=6 \end{gathered}[/tex]now that we have that x = 6, we can find the measure of the sides:
[tex]\begin{gathered} x=6 \\ 3(6)-6=18-6=12 \\ 2(6)-7=12-7=5 \end{gathered}[/tex]therefore, x = 6 and the shorter side measures 5 units
The lengths of the sides of a triangle are given. Classify each triangle as acute, right, or obtuse.A. 4, 5, 6B. 11, 12, 15
To find out if a triangle is acute, right or obtuse we need to use the following rules:
[tex]\begin{gathered} a^2+b^2>c^2\Rightarrow acute \\ a^2+b^2=c^2\Rightarrow right\text{ } \\ a^2+b^2where c is the largest side of the triangle and a and b are the other two sides.A.
In this case c=6 and we can take the other two as a=4, b=5. Then:
[tex]\begin{gathered} 4^2+5^2?6^2 \\ 16+25\text{?}36 \\ 41>36 \end{gathered}[/tex]Therefore triangle A is an acute triangle.
B.
In this case c=15, b=12 and a=11. Then:
[tex]\begin{gathered} 11^2+12^2?15^2 \\ 121+144\text{?}225 \\ 265>225 \end{gathered}[/tex]Therefore triangle B is an acute triangle.
Write the equation for each line in slope - intercept form:Y int: 4 and goes through (1,8)
Okay, here we have this:
Considering that the slope intercept form is the following:
y=mx+b
If we replace with the provided info we obtain the following:
8=m(1)+4
And here we can clear for the slope (m):
8=m(1)+4
8=m+4
m=8-4
m=4
With this slope we can replace in the slope intercept form and finally we obtain the following equation:
6 Find the height of the triangle pictured above, if the area is 12. Round your answer to the nearest tenth
We have that the area of a triangle is given by:
[tex]A=\frac{b\cdot h}{2}[/tex]We replace the values we know:
[tex]12=\frac{6\cdot h}{2}[/tex]Now, we solve for h:
[tex]\Rightarrow h=4[/tex]From this, we have that the height of the triangle is 4 units.
Need to find circumference of the circle. Use 3.14 for the value of pi. m let diameter = 20 in
the circumference of the circle is 62.8 inches
Explanation
the circumference of a circle is given by:
[tex]\text{Circumference(C)}=\text{ Diameter(D)}\cdot\pi[/tex]Step 1
Let
[tex]\begin{gathered} \pi=3.14 \\ \text{Diameter}=\text{ 20 in} \end{gathered}[/tex]now, replace in the formula
[tex]\begin{gathered} \text{Circumference(C)}=\text{ Diameter(D)}\cdot\pi \\ C=\text{ 20in }\cdot3.14 \\ C=62.8\text{ inches} \end{gathered}[/tex]therefore, the circumference of the circle is 62.8 inches
I hope this helps you
Model Kara’s plan with a table,graph, and a explicit and recursive equation
We will write functions for the money that Kara and Kevin will receive each day.
1) The first day, Kara receives $3, and then she receives $1 more each day.
The money that she receives the n day is given by the following recursive function
[tex]f(n)=f(n-1)+1[/tex]where n is the nth day, and f(1) = 3. We can also write this function in the following form:
[tex]f(n)=3+(n-1)\cdot1[/tex]2) In the case of Kevin, he receives $0.25 the first day, and the next day he will receive the double.
So we can write the following recursive function:
[tex]g(n)=2\cdot g(n-1)[/tex]where n is the nth day, and g(0) = 0.25/2. We can also write this function in the following form:
[tex]undefined[/tex]ma ate one slice of pizza, pa ate 2 pizza slices how much pizza did they eat together, what percent of the pizza is not eaten?
According to the given data we have the following:
ma ate one slice of pizza
pa ate 2 pizza slices
Therefore, if there are 8 slices of pizza, the amount of pizza thay they ate together would be calculated as follows:
amount of pizza thay they ate together= number of pieces that they ate together/The total number of pieces
amount of pizza thay they ate together=3/8
amount of pizza thay they ate together=0.375
Therefore to calculate the amount of pizza that is not eaten we would have to make the following calculation:
amount of pizza that is not eaten=1-0.375
amount of pizza that is not eaten=0.625
Therefore, the percent of the pizza is not eaten is 62.5%
Writing an equation in slope intercept form for the line passing through each pair of points. (0,3) (1,-2)
Calculating the slope of the line with points (0,3) (1,-2)
[tex]\begin{gathered} m=\frac{y2-y1}{x2-x1}=\frac{-2-3}{1-0}=\frac{-5}{1}=-5 \\ m=-5 \end{gathered}[/tex]With the slope and one of the points we find the y-intercept with the equation y=mx +b.
y= mx + b (m: slope , b=y-intercept)
3=-5(0) + b (Replacing m=-5 and the point (0,3))
3= 0 + b (Multiplying)
3=b
The answer is y=-5x + 3.
The daily dose for a man who weighs 175 pound is
Daily dosage of medicine for every 20 pounds of body weight = 70 mg
Daily dosage of medicine for every 1 pound of body weight = 70/20 mg
Daily dosage of medicine for every 1 pound of body weight = 3.5 mg
Daily dosage of medicine for every 175 pounds of body weight = 175 x 3.5
Daily dosage of medicine for every 175 pounds of body weight = 612.5 mg
Therefore, the daily dose for a man who weighs 175 pounds is 612.5 mg
If the man is to receive 900 mg in 8 hours
Dosage he will receive in 1 hour = 900/8
Dosage he will receivw in 1 hour = 112.5 mg
Dosage he will receive in 24 hours = 112.5 x 24
Dosage he will receive in 24 hours = 2700 mg
This means the man will take 2700 mg instead of the normal 612.5 mg. He is receiving the wrong dosage
John bought a 20 pound bag of dog food. He feeds his dog twice a day. If John gives his dog 3/4 pound of dog food each feeding, how many days will it last?
Total weight of the bag of dog food bought by John = 20 Pounds
Number of times the dog is fed in a day = 2
Weight consumed by the dog at each feeding = 3/4 Pound.
Therefore:
[tex]\begin{gathered} \text{Weight of food used per day = 2 }\times\frac{3}{4}\text{ } \\ =\frac{6}{4} \\ =\frac{3}{2}\text{ Pounds} \end{gathered}[/tex]To determine how many days the 20-pound bag will last, we have:
[tex]\begin{gathered} \frac{20\text{ Pounds}}{\frac{3}{2}\text{ Pounds per day}} \\ =20\times\frac{2}{3} \\ =\frac{40}{3} \\ =13\frac{1}{3}\text{ days} \end{gathered}[/tex]The 20-pound bag of dog food will last 13 1/3 days.
Use the following words to complete the sentences : 1) Run, 2) Positive , 3) Constant , 4) Linear , 5) Steepness ,6) Vertical 7) Horizontal ,8) Rise 9) Negative , 1) Slope is the ----- of a line. It is also know as the ------ rate of change. 2) If a line is slanting upwards we say it has a ------ slope. If a line is slanting downwards we say it has a ------ slope .3) A slope of zero means the line is ----- .4) An undefined slope means the line is ----- . 5) All straight line graphs are known as ------ relationships .6) To find the slope of a line we use the formula ----- over ------ .
1) Slope is the ----- of a line. It is also known as the ------ rate of change.
Slope means steepness and it is a constant rate of change meaning that it does not change.
2) If a line is slanting upwards we say it has a ------ slope.
Slanting upward means a positive slope, for example when you are moving uphill.
If a line is slanting downwards we say it has a ------ slope
Slanting downward means a negative slope, for example when you are moving downhill.
3) A slope of zero means the line is -----
a Slope of 0 means that the line is horizontal. for example when you are moving on a straight road.
4) An undefined slope means the line is -----
An undefined slope means that the line is vertical. for example when you are climbing a vertical wall.
5) All straight line graphs are known as ------ relationships.
They are known as linear relationships.
6) To find the slope of a line we use the formula ----- over ------
We use the slope formula that is rise over run.
what is the standard deviation of the following data set rounded to the nearest tenth
The general formula for the standard deviation is:
[tex]\sigma=\sqrt{\frac{\Sigma(x_i-\mu)^2}{N}}[/tex]in which, N is the number of data, and μ is the sample's mean.
Start by calculating the sample's mean
[tex]\begin{gathered} \mu=\frac{7.7+8.4+9+8+6.9}{5} \\ \mu=8 \end{gathered}[/tex]then, apply the standard deviation formula
[tex]\begin{gathered} \sigma=\sqrt{\frac{(7.7-8)^2+(8.4-8)^2+(9-8)^2+(8-8)^2+(6.9-8)^2}{5}} \\ \\ \sigma=\sqrt{\frac{(-0.3)^2+(0.4)^2+(1)^2+(0)^2+(-1.1)^2}{5}} \\ \\ \sigma=\sqrt{\frac{2.46}{5}} \\ \\ \sigma=\sqrt{0.492} \\ \sigma=0.701\approx0.7 \end{gathered}[/tex]Answer:
The standard deviation is 0.7