Question

what is the area of the shaded region? 15 mi 16 mi 20 mi 11 mi square miles

Explanation:

Step1: Find outer - rectangle area

$20\times15 = 300$

Step2: Find inner - rectangle area

$16\times11=176$

Step3: Subtract inner from outer

$300 - 176=124$

Answer:

124 square miles