A boat travels at constant speed. After 20 minutes the boat had traveled 2.5 miles. What is the boat's speed (in miles per hour)?

7.5 mph

Step-by-step explanation:

First, you are supposed to divide 2.5 by 20. The answer you will get will be 0.125.  

2.5/ 20 = 0.125

Then you are to multiply 0.125 by 60. The answer will be 7.5

0.125 * 60 = 7.5

Thus, the boat's speed is 7.5 mph

to determine the unit cost your would divide the total cost by the number sold.

7 bagels for $4.41       $4.41/7 = $.63 each at fresh side

5 bagels for $3.60         $3.60/5 = $.72 each at value mart