Tanner and sheldon got receivers for christmas. if they leave at the same time, tanner walking north at 2.5 mph and sheldon is walking east at 3 mph, how long will they be able to talk to each other if the range of communication is 4 miles?

Assume that they start at the origin. After h hours, Tanner will be at point , while Sheldon will be at point

So, the distance between them is

This distance becomes 4 miles after

So, they can walk for a little bit more than 1 hour before they get out of range.

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