Sam bought 2 shirts. Deal A shirt was $20 and was on sale for 10%. Deal B shirt was $ 22 dollars and was on sale for 16%. What was a better deal
was a better deal? hint: figure out the discount and the cost of each shirt
using the "What is..." question. Compare the cost of each shirt.

To solve this exercise, you must apply the proccedure below:

 1. First, you must apply the formula for calculate the area of a semicircle, which is:

 A=πr²/2

 A is the area of the semicircle.
 π=3.14
 r is the radius of the semicircle

 2. The radius is:

 r=D/2
 r=30.77 feet/2
 r=15.385 feet

 3. When you substitute the values into the formula, you obtain:

 A=πr²/2
 A=(3.14)(15.385 feet)²/2
 A=371.61 feet²

 The area that will be painted grey is: 371.61 feet²