Answer:
21
Step-by-step explanation:
all you have to do is get 70% of 30
70% of 30 is 21
I would if i had paper:( its hard to explain
Answer:
7 1/2 cups
Step-by-step explanation:
20 gallons is ten times 2 gallons.
Ten times the amount of water will require ten times the disinfectant (we assume).
... 10 × 3/4 cup = 30/4 cups = 7 1/2 cups
3 + [_] ÷ 7 = 9
[_] ÷ 7 = 9 - 3
[_] = 6 x 7
[_] = 42
to check, just put 42 in the empty place and solve
I have no idea. I'm sorry I havne'nt work on this stuff since 6th grade..
