What is the area of a circle with a radius of 2.1 miles? Estimate the circumference to the hundredths place using 3.14 for π.
_ square miles
Area = πr^2
Area = 3.14 x (2.1)^2
Area = 3.14 x 4.41
Area ≈ 13.85 square miles
Circumference = 2πr
Circumference = 2 x 3.14 x 2.1
Circumference ≈ 13.18 miles