# surface area and volume

I really need some help, I don't fully understand. Exspecially with fractions, don't know how to enter them on calculator.

1. What is the approximate volume of the sphere?

524 m³ (my choice)
1,000 m³
1,256 m³
1,570 m³

2. What is the approximate surface area of the sphere?

225 yd2
707 yd2
1,767 yd2 (my choice)
5,301 yd2

3. What is the approximate volume of the sphere if the surface area is 482.8 mm²?

998 mm³
1,126 mm³
2,042 mm ³
2,993 mm³
I don't understand this one.

4. What is the approximate surface area of the sphere?

342.3 km2
451.9 km2
903.4 km2
2,713 km2
Don't understand.

5. What is the approximate radius of a sphere whose volume is 1,349 cm³?

5.7 cm
6.9 cm
11 cm
14.7 cm
Don't understand.

1. 👍
2. 👎
3. 👁
1. you are dealing with two equations

1. surface area of sphere = 4π r^2
2. volume of sphere = (4/3)π r^3

notice all you need is the radius.
Since we cannot see your diagrams, #1, and #2 cannot be checked

3. given 4πr^2 = 482.8
r^2 = 482.8/(4π) = 38.42
r= √38.42 = 6.198
volume = (4/3)πr^3 = 997.53 , looks like a)

4.
you must have the radius given to you, just plug into the formula

5.
(4/3)πr^3 = 1349
r^3 = 1349/((4/3)π) = 322.05
r= (322.05)^(1/3) , the cube root of 322.05
= 6.85 (looks like b) )

fractions are really just divisions
e.g. 3/4 = 3 ÷ 4 = .75
you calculator should have a key for π

for powers look for key such as yx or a variation of that

to do 322.05^(1/3) I entered

322.05
yx
(1/3)
=
to get 6.85447...

1. 👍
2. 👎
2. number 2 is wrong its b. 707 yd^2.

1. 👍
2. 👎
3. 1. 524 m^3 (A)
2. 707 yd^2 (B)
3. 998 mm^3 (A)
4. 451.9 km^2 (B)
5. 6.9 cm (B)

1. 👍
2. 👎
4. I got a 5/5. Go Mariners!

1. 👍
2. 👎
5. "Hannah is right" was correct!

1. 👍
2. 👎
6. "Hannah is right" Is 100% right!

1. 👍
2. 👎
7. god bless "hannah is right"
100 percent correct ;)

1. 👍
2. 👎
8. thanks hannah you're 100% correct i got a 5/5 100%

1. 👍
2. 👎
9. You is real Hannah

1. 👍
2. 👎
10. Hannah is awesome she was right!

1. 👍
2. 👎
11. Thank you Hanna!!!

1. 👍
2. 👎
12. "Hannah is right" answers are 100% correct.

1. 👍
2. 👎
13. Hana is right 100% 💝🙂 God bless all of u

1. 👍
2. 👎
14. hannah is right is correct

1. 👍
2. 👎
15. hannah is right is still right

1. 👍
2. 👎
16. Thank you "Hannah is right"!!!

1. 👍
2. 👎
17. Hannah is right

1. 👍
2. 👎
18. "Hannah is right" is right lol

1. 👍
2. 👎
19. “Hanna is still right” is still correcto

1. 👍
2. 👎

## Similar Questions

1. ### APChem

Hi I tried to understand this but I don't know why the answer is B: Which one of the following pairs cannot be mixed together to form a buffer solution: A) NaC2H3O2, HCl B)RbOH, HBr C) NH3, NH4Cl D) H3PO4, KH2PO4 E) KOH, HF The

2. ### GENERAL CHEMISTRY

CALCULATE THE pH AND HYDROLYSIS IN 0.10 M AlCl3 SOLUTION.Ka = 1.2 X 10-5 FOR [Al(OH2)6]+3,OFTEN ABBREVIATED Al+3.TELL WHETHER pH IS ACID OR BASE.GIVE IONIC EQUATION. Help us a little by telling us how much you know to do and

3. ### ap history

what was john walthall alleged offense?how might one account for the ferocity of the assault on carter's family walthall? I believe he sleeps with white women but i don't know what he stole. I don't understand the second question.

4. ### statistics

I don't understand how to answer this: relate the three measures of central tendency to a normal distribution- I looked it up online and it said that the mean, median, and mode are all the same but i don't understand how that can

1. ### Math

M is the set of integers that are greater than -1 and less than 4 I don't understand?? i know it's easy but i don't understand how to solve it

2. ### As physics

The table below shows how the braking distance x for a car depends on its initial speed u u / ms-1 5.0 10 20 4 x / m 2.0 8.0 32 128 the reaction time of a driver is 0.60s. Calculate the sopping distance of the car when u= 30ms-1.

3. ### English

Has anyone read "The Destructors" who can help me with a few questions? My questions are: The mood on "The Destructors" is best described as humorous horrific adventuresome cold In "The Destructors" Greene uses a lot of ___ in the

4. ### Geology

I need help with a radiometric dating equation. I am trying to determine the age of a sample that has a 40AR/40K ratio of 4.5. I understand the equation of D=Do+N(e^.693t-1). I understand I would set Do to zero. But what is D? I

1. ### science

I don't fully understand this could you help? In this section, you will create a step-by-step procedure for testing and monitoring the number of trout and catfish in Cypress Pond. You must monitor them once per month for 12 months

2. ### Math

Choose all of the options which are equal to: 1/2(2/3 + 3/4) A: 1/3 + 3/8 B: 17/24 C: 4/11 D: 1/2 x 17/12 E: 1/2(3/4 + 2/3) F: (1/2 + 2/3) + 3/4 Someone please help- I don't understand anything to do with fractions...

3. ### Physics Word Problems

Could you please explain to me these problems, I don't understand them. Do 100 J of work in 50 s and your power output is? - I got 2, but not sure of the units. A bow is drawn so that it has 40 J of potential energy. When fired,