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ivann1987 [24]
3 years ago
12

Find the surface area and volume of a sphere with a radius of 7 in. Round answers to tenths as necessary.

Mathematics
1 answer:
Kamila [148]3 years ago
7 0

Answer:

Surface Area: 615.75

Volume: 1436.76

Step-by-step explanation:

The equation for the surface area of a sphere is 4*pi*r^2

Just do 4*3.14*7*7

The equation for the volume of a sphere is 4/3*pi*r^3

Just do 1.33*3.14*7*7*7

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2 angles are complementary. One of the angles is 30 degrees. The other has a label of 5n + 20. What would "n" have to be?
Citrus2011 [14]

Answer:

n=2

5n+20=30

so, 5(2)+20 =30

10+20=30

5 0
3 years ago
There are 1,845 seats in auditorium. The auditorium has 15 sections with the same number of seats in each section. How many seat
Arlecino [84]
1,845 seats in the auditorium divided by the 15 sections will give you 123

There are 123 seats in each section
4 0
3 years ago
Seven ninths minus one third
erica [24]
An easy way to do questions like these is by converting the fractions into decimals, at least I used to find it easier by doing so when I first encountered them. 
So,
7/9 as a decimal is 0.77
1/3 as a decimal is 0.33

You can do;

0.77 - 0.33

You are left with;

0.44

Which in it's simplest fraction form is;

11/25.

Your answer is 11/25.

I hope this helped, if you need help with understanding how to conver then do let me know! ;3

8 0
3 years ago
A group of 8 girls went apple picking. The girls picked a total of 25 pounds of apples. They each get to take home the same amou
valina [46]

Answer:

Each girl will take home 3.125 poinds of apples

Step-by-step explanation:

25/8 = 3.125

3 0
3 years ago
May raked 40% of the
castortr0y [4]

Answer: 30 bags

Step-by-step explanation:

she raked 40 % of the yard to fill up 12 bags , by proportion:

40% = 12bags

1% = 12/40 bags,

Then 60 % = 12/40 x 60

= 18

Therefore the total bags needed to fill the whole yards will be

18 + 12

= 30

8 0
3 years ago
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