Question

David and Terri drove a small motorboat down a river with a current. The rate the boat traveled in still water was r miles per hour, and the current's average speed was c miles per hour. It took them 1.5 hours to travel 4 miles downstream. Which of the following equations can be used to represent this information?
a. 1.5 = (r + c)4
b. 1.5 = (r - c)4
c. 4 = (r + c)1.5
d. 4 = (r - c) 1.5
PLEASE answer using only one of the a thru d options!

Answer 1

c 4=(r+c)1.5

Answer 2

thank you!

Answer 3

yup