Since 70% of 90 is 63, the average person uses approximately ? Gallons of water indoors per day

answer: 12,000

step-by-step explanation: first you ar e supposed to add. then multiply then subtract

i'm assuming that it's c.)   volcanoes built the mountains and earthquakes tore them down.

answer: 5 17/33 % (to the tenth)

step-by-step explanation:

he guessed: 34.5 pounds

actual weight is 32.7

there for he is off:

34.5 -32.7 = 1.8

32.7 is the 100%

1.8 represents %? of 32.7

therefore:

32.7   - 100%

1.8     -     x%

x= 1.8*100%/32.7% = 18*100%/327%

x=1800%/327%   = (5 165/327)%

to the tenth:

5 17/33 %