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2 years ago

10

Suppose that scores on an exam are normally distributed with mean 80 and standard deviation 5, and that scores are not rounded.

What is the probability that a student scores higher than 85 on the exam

1 answer:

AfilCa [17]2 years ago

7 0

Answer:

3

Step-by-step explanation:

cus it's two 80s and 2 5 so 5 minus 2 is 3

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Lola is making greeting cards, which she will sell by the box at an arts fair. She paid $50 for a booth at the fair, and the mat

Schach [20]

At some point, she will sell enough cards so that her sales cover her expenditures. So, the correct answer is ($40)

<h3> How did we figure this out?</h3>

Lola is making greeting cards, which she will sell by the box at an arts fair. She paid $50 for a booth at the fair, and the materials for each box of cards cost $8. She will sell the cards for $10 per box of cards.

We are going to use 50, 8 and 10 to find are answer.

Therefore, we are going to divide the numbers:

$\boxed{50/10}$

Division problem
50/10
8 x ? = 40

<h3 /><h3>What is the missing number?</h3>

First, we need to figure out 50/10:

$\boxed{50/10=5}$

$\boxed{8x5=40}$

$5=40\\(50/10=5=8x5=40)$

Therefore, at some point, she will sell enough cards so that her sales cover her expenditures. So, the correct answer is ($40)

8 0

1 year ago

True or False: If lim x → a f(x) does not exist, then f is undefined at the point x = a.

kkurt [141]

Answer:

this is absolutely false.

8 0

3 years ago

Find the value of x if it is a number between 8 and 12 exclusive.

sergij07 [2.7K]

Given:

x is a number between 8 and 12 exclusive.

To find:

The value of x.

Solution:

It is given that x is a number between 8 and 12 exclusive. It means the value of x lies between 8 and 12 but 8 and 12 are not included.

$8$

The whole numbers for $8$ range are 9, 10, 11.

Therefore, the values of x are 9, 10, 11 and the value of x in the form of inequality is $8$ .

6 0

3 years ago

Identify the values of a, b, and c that would be used in the quadratic formula to solve the equation −9x = 13 − 5x2.

Softa [21]

B.

You would first have to add 9 to each side so that the equation equaled 0. Then you could pull these numbers.

8 0

3 years ago

Part I: Measuring Parts of a Circle

cluponka [151]

Answer:

case a) The approximate circumference of circle is $5.9\ units$ and the ratio of circumference to Diameter is $\frac{C}{D}=2.95$

case b) The approximate circumference of circle is $6\ units$ and the ratio of circumference to Diameter is $\frac{C}{D}=3$

case c) The approximate circumference of circle is $6.24\ units$ and the ratio of circumference to Diameter is $\frac{C}{D}=3.12$

Step-by-step explanation:

we know that

The approximate circumference of each circle, is equal to the perimeter of each inscribed polygon

case A) the figure is an inscribed pentagon

step 1

Find the approximate circumference of circle

The perimeter of the pentagon is equal to

$P=5s$

where

$s=1.18\ units$

substitute

$P=5(1.18)=5.9\ units$

therefore

The approximate circumference of circle is $5.9\ units$

step 2

Find the ratio of circumference to Diameter

we know that

The radius is half the diameter so

$D=2r=2(1)=2\ units$

The ratio is equal to

$\frac{C}{D}=5.9/2=2.95$

case B) the figure is an inscribed hexagon

step 1

Find the approximate circumference of circle

The perimeter of the hexagon is equal to

$P=6s$

where

$s=1\ units$

substitute

$P=6(1)=6\ units$

therefore

The approximate circumference of circle is $6\ units$

step 2

Find the ratio of circumference to Diameter

we know that

The radius is half the diameter so

$D=2r=2(1)=2\ units$

The ratio is equal to

$\frac{C}{D}=6/2=3$

case C) the figure is an inscribed dodecahedron

step 1

Find the approximate circumference of circle

The perimeter of the dodecahedron is equal to

$P=12s$

where

$s=0.52\ units$

substitute

$P=12(0.52)=6.24\ units$

therefore

The approximate circumference of circle is $6.24\ units$

step 2

Find the ratio of circumference to Diameter

we know that

The radius is half the diameter so

$D=2r=2(1)=2\ units$

The ratio is equal to

$\frac{C}{D}=6.24/2=3.12$

<em>Conclusion</em>

We know that

The exact value of the ratio $\frac{C}{D}$ is equal to

$\frac{\pi D}{D}=\pi$

The approximate value of the circumference will be closer to the real one when the number of sides of the inscribed polygon is greater

4 0

3 years ago