Question

If necessary round your answer to the nearest cent. A. Charlie bought 7 pounds of flour for $3. How many dollars did he pay per pound of flour?B. Debra runs 4 miles in 23 minutes. How many minutes does she take per mile

Answer 1

A.

Charlie bought 7 pounds of flour for $3.

If $3 is the cost for 7 pounds of flour, the question asks us to find the amount he can pay for 1 pound (i.e. the amount he pays per pound of flour)

This means that:

`1\text{pound of flour=}(3)/(7)\text{ \$ per pound}`

Therefore, Charlie pays $0.43 per pound.

Answer: 43 cents per pound

B.

Debra runs 4 miles in 23 minutes.

The question asks how long it will take for her to run 1 mile (or per mile)

So we can break it down this way:

4 miles = 1 mile + 1 mile + 1 mile + 1 mile

23 mins = 23/4 mins + 23/4 mins + 23/4 mins + 23/4 mins

or

We can say that

`\begin{gathered} (23)/(4)\text{ minutes per mile} \\ 5.75\text{ minutes per mile} \end{gathered}`

Answer: 5.75 minutes per mile