A physics test is normally distributed. The class average was 79.3, and the standard deviation was 7.5. What percent of students scored between a 68 and 86.8?

Answers

Answer 1

Answer:97.275% or 97.5%

Step-by-step explanation:


Related Questions

Order 0.12, 0.1, 0.02, and 0.21 in order from least to greatest.

Answers

This is the answer

0.02

0.1

0.12

0.21

Answer:

Step-by-step explanation:I don't say u must have to mark my ans as brainliest but if it has really helped u plz don't forget to thnk me...

Find the Surface Area of this triangular prism.

Answers

Answer:

408 squared units

What is the rule that describes the numbers in this pattern?
-10,000; -1,000; -100; -10; -1; -0.1; -0.01; -0.001
A Each number is 10 more than the number to its left.
B Each number is one-tenth the number to its left.
C Each number is one-tenth the number to its right.
D Each number is 10 times the number to its left.

Answers

Answer: C Each number is one-tenth the number to its right.

Step-by-step explanation: Just count the number to the right each time.

Anita has two options for how to invest $1,000. Plan A: put the 1,000 in an account that pays $100 per year. Plan B: put the 1,000 in an account that pays 5 percent interest per year. What statement is true? Plan A will be worth more than plan B after two years. Plan A will be worth more than plan B after one year. Plan B will be worth more than plan A after three years. Plan B will be worth more than plan A after four years.

Answers

Answer:

True Plan A will be worth more than plan B after two years.

True Plan A will be worth more than plan B after one year.

False Plan B will be worth more than plan A after three years.

False Plan B will be worth more than plan A after four years.

Step-by-step explanation:

plan A proves 10% Standard interest as it is $100 every year

plan B proves $50 per year Standard interest and may increase if this was CI interest as it may include interest on interest but nothing was mentioned that Plan B was CI type interest or any different from plan B type.

Because of this we can only agree option 1+2 out of 1-4 is true.

the ratio of the number of Annes pencils to the number of jasons pencils is 4:3. Anne has 100 pencils how many pencils does Jason have

Answers

Answer:

Jason has 75 pencils.

Step-by-step explanation:

In order to get from 4 to 100, you must multiply by 25 (100/4 = 25). And in order to find the amount of pencils Jason has, you must have an equivalent ratio. So you have to also multiply 3 by 25, 3 * 25 = 75. Jason has 75 pencils.

Which statement is true about the end behavior of the
graphed function?

A: As the x-values go to positive infinity, the function's
values go to negative infinity.

B: As the x-values go to zero, the function's values go to
positive infinity

C: As the x-values go to negative infinity, the function's
values are equal to zero.

D: As the x-values go to positive infinity, the function's
values go to positive infinity.

Answers

Answer:

Option A.

Step-by-step explanation:

Let the given graph represent the function f(x).

From the given that given graph it is clear that the end behavior of the function f(x):

1. As the x-values go to positive infinity, the function's values go to negative infinity.

[tex]\lim\limits_{x\to \infty}f(x)=-\infty[/tex]

2. As the x-values go to negative infinity, the function's values go to positive infinity.

[tex]\lim\limits_{x\to -\infty}f(x)=\infty[/tex]

Therefore, the correct option is A.

Identify and explain the error.

Answers

Answer:

Step-by-step explanation:

Strictly speaking, 15% isn't precisely the same as 0.15; 0.15 is the decimal fraction used to calculate 15% of some quantity.

15% of 52 is indeed 7.8.  $7.80 is the discount that is to be SUBTRACTED  from the regular price ($52).  Adding $7.80 to $52 is incorrect.  

Also, 52 + 7.8 - 59.8 is incorrect:  it's not an equation (but should be one), and we should be subtracting $7.80 from $52.

If the acute angle made by two intersecting lines l and m is 51° and image ABCD is reflected across the line l followed by a reflection across line m, then find the angle through which ABCD is rotated. Question 10 options: A) 25.5° B) 102° C) 26° D) 51°

Answers

Answer:

B) 102°

Step-by-step explanation:

Reflection is an example of transformation in which a given image is flipped over a reference line which changes the orientation of the figure, but not its length and shape. A rotational transformation is formed by two reflections.

In the given question, image ABCD is reflected over lines I, then m at an angle of 51° to each other. Since rotation is twice the acute angle with respect to the center of rotation, therefore ABCD rotates through an angle of 102°.

Carl bought 17 packs of baseball cards at a flea market, at a total cost of $37.91. If each pack of cards cost the same amount, how many much de each pack cost

Answers

Answer:

[tex]=2.23[/tex]$

Step-by-step explanation:

[tex]\frac{37.91}{17}\\\mathrm{Divide\:the\:numbers:}\:\frac{37.91}{17}=2.23\\=2.23[/tex]

Answer:

$2.23

Step-by-step explanation:

17 packs = $37.91

/17. /17.

1 pack = $2.23

find the slope of the line that passses thruogh 7.7 and 2,1

Answers

Answer:

6/5

Step-by-step explanation:

m=(y2-y1)/(x2-x1)

m=(1-7)/(2-7)

m=-6/-5

m=6/5

Monique made several batches of soup for a potluck supper. Each batch required 3/4 of a pound of potatoes, and she used a total of 6 1/2 pounds of potatoes. How many batches of soup did Monique make?

Which division and multiplication problems could represent this scenario? Check all the apply.

A)3/4 divided by 13/2

B)13/2 divided by 3/4

C)3/4(13/2)

D)13/2(3/4)

E)13/2(4/3)

Answers

Answer:

B and E

Step-by-step explanation:

Answer:

B) 13/2 divided by 3/4 and E) 13/2(4/3)

Is (–5, 0) a solution to the equation y = 7x − 5?

Answers

Answer:

no

Step-by-step explanation:

to see, plug in -5 for x and find your y outcome.

y = 7(-5) -5

y = -35 - 5

y = -40

since y does not equal 0, (-5,0) is not a solution for the equation.

Answer:

no

Step-by-step explanation:

y = 7x − 5?

Substitute the point into the equation

0 = 7(-5) -5

0 = -35-5

0 = -40

This is not true so (-5,0) is not a solution

Find the slope of the line through (2, -3) and (-4, 3).

Answers

Answer:

Slope= -1x OR -x

Step-by-step explanation:

rise over run: y2 - y1 / x2 - x1

= 3 - (-3) / -4 - 2

= 6 / -6

= -1

Answer:

Y=-x-3 slope =-1

Step-by-step explanation:

To first find the gradient u have to subtract the y intercepts and the x intercepts

3--3/-4-2

=6/-6=-1

Y-3/x--4=-1

Y-3=-1(x+4)

Y-3=-x+-4

Y=-x-4+3

Y=-x-3

Slope=-1

NEED HELP ASAP

In the unit similar triangles and trigonometry, what is “ compass bearings ?”

Answers

Answer:

this is what I found "The bearing of a point is the number of degrees in the angle measured in a clockwise direction from the north line to the line joining the centre of the compass with the point. A bearing is used to represent the direction of one point relative to another point."

I can't really make sense of it though...

Answer:

What is the difference between constructing a square and constructing a regular hexagon?

The diameter of the circle is used for the square construction, but the radius of the circle is used for the regular hexagon construction.

The radius of the circle is used for the square construction, but the diameter of the circle is used for the regular hexagon construction.

The square will need two arcs along the circle, but the hexagon will need two arcs above and two arcs below the diameter of the circle.

The square will need six arcs along the circle, but the hexagon will need two arcs above and two arcs below the diameter of the circle.

Step-by-step explanation:

h(x)= 1/8x^3-x^2 Over which interval does h have a positive average rate of change ?

Answers

Answer:

6<x<8? I think this is the answer. I am not sure so please do not rely on me. I am not the smartest!

Step-by-step explanation:

plz help will be marked brillent 5 stars and thanks !!!!

Answers

The answer is 25!
3 times 7 = 21 + 4 = 25
Question 2: the answer is 12c-49

Need help on this please, a positive answer only :)!

Answers

Answer:

all statements are true

Step-by-step explanation:

for A  real numbers are all numbers B is all the x values C when f(x)=5 x=-2 D when f(x)=-1 x=-6

Please help me i have 15 minutes left please help ill give 15 points

Answers

Step-by-step explanation:

(-4ab - 5a + 3) - (-7ab + 9)

Answers

________________________________

Hey!!!

solution,

(-4ab - 5a +3)-(-7ab+9)

=-4ab -5a+3 + 7ab - 9

= -4ab+7ab-5a+3-9

= 3ab-5a-6

Hope it helps...

Good luck on your assignment

______________________________

please help!!!
All of the triangles above are _____ triangles.
a.) obtuse
b.) isosceles
c.) right
d.) acute

Answers

they’re all isosceles triangles because they have two sides that are matching. please vote for this answer as Brainliest if it helped! have a great day! :)
it’s b) isosceles since for every triangle the 3 angles are the same except for 1.

A serving tray is in the shape of a rectangular prism without a top. The dimensions of the tray are 8 inches by 10 inches by 2 inches. What is the surface area of the tray?
A: 152 square inches
B: 212 square inches
C: 216 square inches
D: 232 square inches

Answers

Answer:

it's a 152

Step-by-step explanation:

The surface area of the rectangular prism is S = 232 inches²

What is the surface area of the prism?

The surface area of the prism is calculated as

The formula for the surface area of a prism is SA=2B+ph, where B, is the area of the base, p represents the perimeter of the base, and h stands for the height of the prism

Surface Area of the prism = 2B + ph

The area of the triangular prism is A = ph + ( 1/2 ) bh

Given data ,

A serving tray is in the shape of a rectangular prism without a top.

And , dimensions of the tray are 8 inches by 10 inches by 2 inches.

So , surface area A = 2(80) + 2(16) + 2(20)

A = 160 + 32 + 40

A = 232 square inches

Hence , the surface area is 232 inches²

To learn more about surface area of prism click :

https://brainly.com/question/9183590

#SPJ3

Please help ASAP. Will mark as Brainliest.

∠A and ∠B are supplementary. If m∠A = 83° , what is the measure of ∠B?


83°
97°
17°

Answers

suplementary means adds to 180

a+b=180

a=83

83+b=180

minus 83 both sidse

b=97

answer is 97 degrees

Answer:

97°

Step-by-step explanation:

Supplementary angles are a pair of angles whose sum is 180°.

If one angle of a pair of supplementary angles is given, it is easy to find the other angle.

It can be found out by subtracting the given angle from 180.

So here in this case, ∠A + ∠B = 180° where ∠A = 83°

83 + ∠B = 180

∠B = 180 - 83

∠B = 97°

So the m∠B = 97°

Hope this answer helps you.

PLS MARK ME AS BRAINLIESt.

Use the following information for #19
Connor makes $120 for every 10 hours he works.
#19 If Connor earns $300, how many hours has he worked?

Answers

Answer:

25 hours

Step-by-step explanation:

$120 for every 10 hours

$12 for every hour

$300/12= 25 hours

equivalent fractions for 5 out of 7​

Answers

Answer:

There are 20 ways but I will give you 4 :)

1. Multiply the numerator and the denominator by 2:

5/7 x 2/2 = 10/14

2. Multiply the numerator and the denominator by 3:

5/7 x 3/3 = 15/21

3. Multiply the numerator and the denominator by 4:

5/7 x 4/4 = 20/28

4. Multiply the numerator and the denominator by 5:

5/7 x 5/5 = 25/35

Step-by-step explanation:

There you go!

A thousand dollars is left in a credit union drawing 7% compounded monthly.
What is the balance at the end of 10 years?




Please show the work to answer compound interest work

Answers

Answer: $2009.66

Step-by-step explanation:

A = P(1 + r/n)^nt

The balance at the end of 10 years in account after the credit union drawing 7% compounded monthly is $2009.66

What is compound interest?

Compound interest is the amount charged on the principal amount and the accumulated interest with a fixed rate of interest for a time period.

The formula for the final amount with the compound interest formula can be given as,

[tex]A=P\times\left(1+\dfrac{r}{n\times100}\right)^{nt}\\[/tex]

Here, A is the final amount (principal plus interest amount) on the principal amount P of with the rate r of in the time period of t.

A thousand dollars is left in a credit union drawing 7% compounded monthly. The balance at the end of 10 years has to be find out.

Here the data given are,

Principal amount $1000.The rate of interest is 7%.Time period is 10 years.The number of month in a year is 12.

Put these values in the above formula as,

[tex]A=1000\times\left(1+\dfrac{7}{12\times100}\right)^{12\times10}\\A=2009.66[/tex]

Thus, the balance at the end of 10 years in account after the credit union drawing 7% compounded monthly is $2009.66

Learn more about the compound interest here;

https://brainly.com/question/24274034

Yolanda participated in a walkathon in which each kilometer walked raised $10 for charity. Her goal was to raise more than $300 on Saturday and Sunday. She raised $50 on Saturday. Which graph shows all the distances, in kilometers, that Yolanda could have walked on Sunday to reach her goal?

Answers

Answer:

B

Step-by-step explanation:

She needed to raise at least $250

$250 divided by $10 equals 25 km

So she need more than 25km to raise over $300

Question 3(Multiple Choice Worth 1 points)

(08.05 MC)

The graph of f(x) = x2 is shifted 3 units to the left to obtain the graph of g(x). Which of the following equations best describes g(x)?

g(x) = (x + 3)2
g(x) = x2 − 3
g(x) = x2 + 3
g(x) = (x − 3)2

Answers

Answer:

[tex]g(x)=(x+3)^2[/tex] best describes g(x)

Step-by-step explanation:

We are given an equation of graph[tex]f(x)=x^2[/tex]

Rule : When the graph f(x) shifts left by c units . So, resultant graph is f(x+c)

Now we are given that The graph of [tex]f(x) = x^2[/tex] is shifted 3 units to the left to obtain the graph of g(x).

So, By using rule :

[tex]f(x+3)=(x+3)^2[/tex]

So, [tex]g(x)=(x+3)^2[/tex]

So, Option A is true

Hence [tex]g(x)=(x+3)^2[/tex] best describes g(x)

Guess the riddle!!!!
1 rabbit saw 9 elephants while going to the river. Every elephant saw 3 monkeys going to the river. Each monkey had 1 tortoise on each hand.
How many animals are going to the river ?

Answers

10 animals would be going to the river

Answer: 10 animals would be going to the river

Step-by-step explanation:

Took the test


Write the equation in standard form for the circle passing through (6, 6) centered at the
origin

Answers

Answer:

x² + y² = 72

Step-by-step explanation:

The equation of a circle centred at the origin is

x² + y² = r² ( r is the radius )

The radius is the distance from the centre to a point on the circle.

Use the distance formula to calculate r

r = √ (x₂ - x₁ )² + (y₂ - y₁ )²

with (x₁, y₁ ) = (0, 0) and (x₂, y₂ ) = (6, 6)

r = [tex]\sqrt{(6-0)^2+(6-0)^2}[/tex]

  = [tex]\sqrt{6^2+6^2}[/tex]

  = [tex]\sqrt{36+36}[/tex]

  = [tex]\sqrt{72}[/tex]

Thus

x² + y² = ([tex]\sqrt{72}[/tex] )² , that is

x² + y² = 72 ← equation of circle

Help anyone???? Please

Answers

Answer: A

Angle a = Angle b since they are vertical angles

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