I have been trying a couple problems for the past hour and am having a hard time.

Could someone please walk me through each, or even one of the problems?

If you solve it could you please show work so I can learn?

Thank you so much!

1. A family travels 18 miles downriver and returns. It takes 8 hours to make the round trip. Their rate in still water is twice the rate of the current. How long will the return trip take?

2. The circumference of a circle varies directly as the diameter. A circular pizza pie with a diameter of 1 foot has a circumference of 3.14 feet. What will be the circumference of a pizza pie with a diameter of 1.5 feet?