Question

A farmer needs to mix 12 ounces of fertilizer for every 10 pounds of soil. How many pounds of fertilizer will the farmer need to make a mix that contains 120 pounds of soil? A) 0.06 B)9 C)144 D)230.4

Answer 1

b = 9

Explanation:

fertilizer : soil

3/4 : 10 = x : 120

90 =10x

9=x

You will need 9 pounds of fertilizer, so the answer is B)9.

Answer 2

We can use a ratio to find the answer. Since the final answer is asking for pounds, we can just change all of the units to pounds now.
12 ounces=3/4 pounds

fertilizer : soil
3/4 : 10 = x : 120

90 =10x
9=x

You will need 9 pounds of fertilizer, so the answer is B)9.

Hope this helps!