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Tatiana [17]
3 years ago
15

The circumference of a bowling ball is 8π in. Find the surface area of the bowling ball. Express your answer in terms of π.

Mathematics
2 answers:
telo118 [61]3 years ago
7 0
Circumference of a sphere: 2 * pi * r
8 / 2 = 4
r = 4

surface area of a sphere: 4 * pi * r^2
4 * pi * 4^2
4 * pi * 16
64pi

answer is c :)
grandymaker [24]3 years ago
3 0

Answer: A. 16\pi\ in^2

Step-by-step explanation:

Now, we know that the circumference of a sphere is given by :-

\text{Circumference}=2\pi r=\\\\\Rightarrow\ 8\pi=2\pi r\\\\\Rightarrow\ r=\dfrac{8}{2}=4\text{ in.}

We know that the surface area of a sphere is given by :_

\text{Surface Area}=4\pi r^2\\\\\Rightarrow\text{Surface Area}=4\pi(4)^2=16\pi\ in^2

Hence, the surface area of the given sphere = 16\pi\ in^2

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It is one more than the sum of the first three natural numbers, followed by the 24th letter of the alphabet. Please help
Luda [366]

Answer:

The set of natural numbers is the set of all positive integers, then this set is:

{1, 2, 3, ...}

and the 24th letter of the alphabet is x

Now we want to write the expression given in the sentence "It is one more than the sum of the first three natural numbers, followed by the 24th letter of the alphabet"

We can "break" this in parts, so it is easier to understand.

Then:

"...the sum of the first 3 natural numbers..."

is:

1 + 2 + 3

Then:

"...the sum of the first 3 natural numbers, followed by the 24th letter of the alphabet"

This can be written as:

(1 + 2 + 3) + x

Now we can analyze the complete sentence:

"It is one more than the sum of the first three natural numbers, followed by the 24th letter of the alphabet"

This is equal to the expression we found above plus one, then we can write this as:

[(1 + 2 + 3) + x] + 1

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4 0
3 years ago
Please help out need it​
juin [17]

Answer:

at the answer is about 5.29

Step-by-step explanation:

to do this u need the pythagorean theorem.

a squared+ b squared=c squared

we have the a and c values so what u would do is c squared- a squared. (8 squared - 6 squared = b squared.

8 0
3 years ago
Read 2 more answers
PLEASE HELP MEEEEEEEEE
kakasveta [241]

Answer:

ok so first amanda crossed then 10 meteters after bailey then anoth 10 meters cecilia so

10+10=20

20 meters

Hope This Helps!!!

4 0
3 years ago
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