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3 years ago

What is the surface area of a sphere with a radius of 14 units?

Mathematics

1 answer:

zloy xaker [14]3 years ago

7 0

Answer:

$SA=784\pi\ units^{2}$

Step-by-step explanation:

we know that

The surface area of a sphere is equal to

$SA=4\pi r^{2}$

we have

$r=14\ units$

substitute

$SA=4\pi (14)^{2}$

$SA=784\pi\ units^{2}$

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The Click-O Pen Company produced 1.8x10^6 pencils each year for 4 years. What was the total number of pencils the Click-O Pen Co

Nataliya [291]

Answer: The pencils produced by Click-O-Pen Company for 4 years = $7.2\times 10^6$

Step-by-step explanation:

Given :

Pencils produced by Click-O-Pen Company each year = $1.8\times 10^6$

Using unitary method:

Pencils produced by Click-O-Pen Company for 4 years = $\frac{1.8\times 10^6}{1}\times 4=7.2\times 10^6$

Thus Pencils produced by Click-O-Pen Company for 4 years = $7.2\times 10^6$

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3 years ago

Solve the equation. 2(x + 4) = 30 A. 7 B. 11 C. 15 D. 19

evablogger [386]

If you would like to solve the equation 2 * (x + 4) = 30, you can calculate this using the following steps:

2 * (x + 4) = 30
2 * x + 2 * 4 = 30
2 * x + 8 = 30
2 * x = 30 - 8
2 * x = 22 /2
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The correct result would be B. 11.

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3 years ago

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9. What is the likelihood that a randomly selected couple's relationship survived between 90 and 150 days

andrew-mc [135]

Answer:

0.5818

Step-by-step explanation:

Suppose the average teenage romantic relationship is normally distributed with a mean number of 100 days with a standard deviation of 30 days.

Answer:

The z score is used to determine how many standard deviations that the raw score is above or below the mean. If the z score is positive then the raw score is above the mean and if it is negative then it is below the mean. It is given by:

$z=\frac{x-\mu}{\sigma}\\ \\where\ \mu=mean,\sigma=standard\ deviation, x=raw\ score$

Given that:

$\mu=100\ days,\sigma=30\ days\\\\For\ x=90\\\\z=\frac{90-100}{30} =-0.33\\\\For\ x=150\\\\z=\frac{150-100}{30} =1.67$

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3 years ago

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ch4aika [34]

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