Question

Answer each part. If necessary, round your answers to the nearest hundredth.

(a) Justin runs 6 miles in 50 minutes.
How many minutes does he take per mile?
(b) Lena bought 19 pounds of flour for $8. How many dollars did she pay per pound of flour?

Answer 1

Justin takes approximately 8.33 minutes per mile when he runs 6 miles in 50 minutes, and Lena pays approximately $0.42 per pound of flour when she buys 19 pounds for $8.

Step-by-step explanation:

Mathematical Problem Solving

To answer each part of the question, we need to use basic division to find the rate. The questions are related to unit rate and unit conversion.

(a) Justin runs 6 miles in 50 minutes.
To find the time he takes per mile, we divide the total time by the number of miles. So:

1. Time per mile = Total time / Number of miles = 50 minutes / 6 miles
2. Time per mile ≈ 8.33 minutes/mile

(b) Lena bought 19 pounds of flour for $8.
To find the amount she paid per pound, we do a similar division:

1. Dollars per pound = Total dollars / Number of pounds = $8 / 19 pounds
2. Dollars per pound ≈ $0.42/pound

To round each answer to the nearest hundredth, we have already rounded the minutes per mile to 8.33, and the dollars per pound to 0.42.