Question

Find the surface area for a sphere with a radius of 10 feet. Round to the nearest whole number.
1,256 ft2
4,189 ft2
1,089 ft2
1,568 ft2
Find the volume of a sphere with a radius of 10 feet. Round to the nearest whole number. 1,257 ft3
4,187 ft3
1,089 ft3
1,568 ft3

Find the surface area for a sphere with a radius of 7 cm. Round to the nearest whole number.
307 cm2
1,436 cm2
1,020 cm2
615 cm2

Answer 1

@qweqwe123123123123111

Answer 2

A = 4πr²
V = 4/3 πr³

Answer 3

is that too the first question??

Answer 4

hey my friend says your really smart qwe

Answer 5

They're the answers to all 3 of your questions.

Answer 6

I'm not smart.

I have google. :-)

Answer 7

1256 is step a for question 1

Answer 8

1256 is the answer to question 1.

Answer 9

thats what i thought cause i did v and i was all liek wait what!!!

Answer 10

Yes...volume will be somewhat larger... :-)

Answer 11

i meant 3rd questions answer is 615.44

Answer 12

Yes, 615 is question 3. :-)

Answer 13

and on volume does he mean 1/3?

Answer 14

Area of Sphere Formula

Answer 15

No. He means 4/3 (same as 1.33333.....)

v = 4/3 pi r^3

Answer 16

\[A = \frac{ 4 }{ \pi r^2 }\]

Answer 17

so for the last one your equation would be.

Answer 18

is it c?

Answer 19

\[\frac{ 4 }{ \pi(49) }\]

Answer 20

C? No.

Answer 21

What's pi * r^3 ?

Answer 22

You still here?

Answer 23

3140 sorry i wasnt there

Answer 24

@tafkas77

Answer 25

Hi there! You mentioned me; what can I help you with? I'm not sure which question you're looking at. :)

Answer 26

the middle one

Answer 27

Are you still trying to figure out the answer to #3?

Answer 28

.... Hello? @niall1Dawesome You there?

Answer 29

sorry my computer was lagging really bad

Answer 30

no number 2 i already know 1 and 3

Answer 31

@tafkas77

Answer 32

Okay. I'm taking a look at this right now. :)

Answer 33

Eureka! I have the answer. :) Do you know the formula to calculate this?

Answer 34

okay and hey you changed your icon cool

Answer 35

Ha ha, yeah. :) I felt like switching it up a bit.

So do you know the formula to calculate this?

Answer 36

Are you still experiencing lag?

Answer 37

a little

Answer 38

and well isnt the formula V = 4/3 πr³

Answer 39

Okay, I think you are still experiencing a little lag. No worries, I can still help you with this. Hopefully when you see it, you'll get it! :) Perfect formula! :)

Answer 40

ya your post jsut showed up

Answer 41

So let's plug in the values from your problem:

\[v = 4/3 * \pi * 10^3\]

\[v = 4/3 * \pi * 1,000\]

When you plug this all in (you can do it on a calculator), you'll find that 4/3 = 1.3.

so:

\[v = 1.3 * 3.14 * 1,000\]

And then you'll get your answer. :)

Answer 42

ok i will do that

Answer 43

4082

Answer 44

Sorry; my mistake. You should have rounded 1.3 and input 1.4 (since 1.3333333... is irrational) and you would have gotten 4,187 :)

Answer 45

oh lol

Answer 46

XD Hey, everyone makes mistakes... ugh... can't say that without thinking of Hannah Montana...

Answer 47

hey can you check my answer to a question like this

Answer 48

yes I sure can! :)

Answer 49

Find the volume for a sphere with a radius of 7 cm. Round to the nearest whole number.
307 cm2
1,436 cm2
1,020 cm2
615 cm2
im pretty sure its b but im going to redo the math

Answer 50

hehe hannah montana lol

Answer 51

yea i think it is b

Answer 52

You are absolutely correct. :)

Answer 53

yay lol thx for helping me

Answer 54

You're welcome! :D

Answer 55

:) everybody makes mistakes everybody has those days 1 2 3 4 lol i had too