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3 years ago

What is the radius of a sphere that has a surface area of 951.1 in2?

Mathematics

2 answers:

Archy [21]3 years ago

8 0

Answer:

The answer is D. 8.7

Step-by-step explanation:

A=4πr2

Solving fore

r=1

π=1

2·951.1

π≈8.69978in

dusya [7]3 years ago

4 0

Answer:

FORMULA FOR SURFACE AREA OF SPHERE = 4 pi r^2

r = 6 " area = 4 pi X 6 X 6 = 144 pi " squared

r = 12 "

area = 4 X pi X 12 X 12 = 576 pi" squared

ANSWER Area will be 4 times the original

Step-by-step explanation:

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Type an equivalent expression to show the relationship of multiplication and addition.<br><br> 3y

defon

Answer:

y + y + y

Step-by-step explanation:

The term 3y means that the variable y should be added together three times.

Addition is equivalent to multiplication in that given an expression mx, where m is a real number. the expression indicates that the variable x should be added together in m number of times

8 0

3 years ago

Write the formula for an exponential function with initial value 300 and decay factor 0.73

postnew [5]

Answer: 300*0.73^x

Step-by-step explanation:

300 is the initial value and every time x goes up by 1, the value get multiplied by 0.73

when x=3

then the value would be 300*0.73*0.73*0.73 or 300*0.73^3

then for x amount of times the equation would be 300*(0.73 x times ) or 300*0.73^x

8 0

3 years ago

At your job, you make $8 per hour, and are promised to get a $0.03 per month. Your friend makes $8.15, and is promised a $0.02 r

Rudik [331]

Answer:

3883.2 dollars.

Step-by-step explanation:

We must analyze the situation of each one,

The first tells us to earn 8 dollars an hour, he is promised to receive 0.03 dollars per month, which means that he would already have that increase that month. Therefore, you would have 8.03 per hour of earnings.

The second, on the other hand, although he earns $ 8.15 per hour, the increase is promised every month, that is, it is NO month with the increase of 0.02.

Now assuming they work 8 hours a day and 30 days a month, it would be a total of 8 * 30 = 240 hours.

Now multiplying your hourly income, we will get what each person earns per month.

8.03 * 240 = 1927.2 dollars

8.15 * 240 = 1956 dollars

Which means that both will earn a total of:

1927.2 + 1956 = 3883.2 dollars.

4 0

3 years ago

penny baked 5 1/2 dozen cookies to sell at her daughters class fundrasier. her little boy snuck in the kitchen and ate 1/4 dozen

olasank [31]

63 cookies because 5 1/2 = 66 minus 3= 63 cookies

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3 years ago

Consider a triangle ABC like the one below. Suppose that a = 31, b = 23, and c = 20. (The figure is not drawn to scale.) Solve t

krok68 [10]

The solution to the triangle is A = 92.0, B = 47.9 and C = 40.1

<h3>How to solve the triangle?</h3>

The figure is not given;

However, the question can still be solved without it

The given parameters are:

a = 31, b = 23, and c = 20

Calculate angle A using the following law of cosine

a² = b² + c² - 2bc * cos(A)

So, we have:

31² = 23² + 20² - 2 * 23 * 20 * cos(A)

Evaluate

961 = 929 - 920 * cos(A)

Subtract 929 from both sides

32 =- 920 * cos(A)

Divide both sides by -920

cos(A) = -0.0348

Take the arc cos of both sides

A = 92.0

Calculate angle B using the following law of sine

a/sin(A) = b/sin(B)

So, we have:

31/sin(92) = 23/sin(B)

This gives

31.0189 = 23/sin(B)

Rewrite as:

sin(B) =23/31.0189

Evaluate

sin(B) =0.7415

Take arc sin of both sides

B = 47.9

Calculate angle C using:

C = 180 - 92.0 - 47.9

Evaluate

C = 40.1

Hence, the solution to the triangle is A = 92.0, B = 47.9 and C = 40.1