Help plz am so sad i have a final exam solve anything

Step-by-step explanation:

dimeter=4.2cm

radius=4.2/2

radius = 2.1

circumferenc of circle is 2πr

2×3.14×2.1= 13.1

B radius=11

C=2πr

C=2*3.14*11

C= 69.08

Step-by-step explanation:

page 1

3.14x4.2=13.2

B

page 2

11x2=22

3.14x22=69.1

B

page 3

C?

page 4

B

page 5

3x2=6

3,14x6=18.8

B

step-by-step explanation:

this is not possible to solve with the info given.   you need at least an one angle somewhere.

step-by-step explanation:

12: 00 p.m. to 7: 00 p.m. is a total of 7 hours.

4: 00 p.m. to 7: 00 p.m. is a total of 3 hours.

this means that from 4: 00 p.m to 7: 00 p.m. this represents 3/7 of what was lost from 12: 00 p.m. to 7: 00 p.m.

after knowing this, after doing 11,600 - 6,800 = 4,800

4,800 represents 3/7 of what was lost for 7 hours.

we then divide 4,800 by 3 which gets 1,600.

because we know that 1,600 represents 1/7 of how much water was lost, we just have to multiply by 7, which gets 11,200.   after adding 11,200 to how much water was left at 7: 00 p.m. which was 6,800. 11,200 + 6,800 = 18,000

this means that the pool originally had 18,000 gallons in the pool.

you can also check your work by doing 18,000 - 4(1600), which becomes           1800 - 6400 which gets you 11,600.