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2 years ago

I need help on this math

Mathematics

1 answer:

Anestetic [448]2 years ago

8 0

Answer:

It is the second one because you have to do the reverse of the circle area formula which is $r=\sqrt{\frac{A}{\pi } }$ .

Hope this helps :)

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Use the Distributive Property <br> 8(3x+2)

MA_775_DIABLO [31]

Answer:24x+16

Step-by-step explanation:

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2 years ago

Which of the following set of numbers is made up of integers?

earnstyle [38]

Answer:

the answer is number 1

Step-by-step explanation:

integers are whole numbers

6 0

2 years ago

Write an expression<br> for: "the quotient of<br> a number and 7<br> increased by 10"

yarga [219]

Answer:

(n / 7) + 10 = x

Step-by-step explanation:

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2 years ago

A numerical pass code is required to open a car door. The pass code is five digits long and uses the digits 0-9.

topjm [15]

Answer:

100000 pass codes

Step-by-step explanation:

the pass code form is: abcde

a: 10 numbers to choose

b: 10 numbers

c: 10 numbers

d: 10 numbers

e: 10 numbers

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8 0

2 years ago

The scores on a psychology exam were normally distributed with a mean of 57

olya-2409 [2.1K]

Answer:

Cutoff for a failing score is 49 and 2.28% students failed.

Step-by-step explanation:

We have been given that scores on a psychology exam were normally distributed with a mean of 57 and a standard deviation of 4.

2 standard deviation below mean would be,

$57-2(4) =57-8= 49$

Therefore,Cutoff far a failing score is 49.

Now let us find out the z-score for our given values,

$z=\frac{x-\mu}{\sigma}$

$z=\frac{49-57}{4}=\frac{-8}{4} =-2$

Now let us look up the probability from normal distribution table.

$P(z$

Therefore, percentage of students failed is 2.28%.

3 0

3 years ago