5 mi
a
3 mi
What is the length of the missing leg ?

A=4

Step-by-step explanation:

you use the Pythagorean Theorem,

 a triangle having a Leg b length of 3 and a Hypotenuse c length of 5 would have a Leg a length of 4.

Here is how I solved for Leg a using the Pythagorean Theorem.

Leg a = sqrt[ (Hypotenuse c)2 - (Leg b)2 ]

Leg a = sqrt[ (5)2 - (3)2 ]

Leg a = sqrt[ 25 - 9 ]

Leg a = sqrt[ 16 ]

Leg a = 4

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