In the morning, a farm worker packed 10 pints of raspberries every 4 minutes. In the afternoon, she packed 3 pints of raspberries every 2 minutes. What was the difference between her morning and afternoon packing rates, in pints per hour?

60 pints

Step-by-step explanation:

10 pints every 4 minutes = 10(15) pints every 4(15) minutes which is the same as 150 pints per 1 hour

3 pints every 2 minutes = 3(30) pints every 2(30) minutes which is the same as 90 pints per 1 hour

150 - 90 = 60 pints difference

use distributive property on all like terms and change your signs if you have a double negative or if you have positive/negative