Always to do each to 1 sigfig 20-6=14
Answer:
4 years difference
Step-by-step explanation:
Area = pi*r^2
Circumference = 2pi*r
Step 1: find the radius from area
81pi=pi*r^2
81=r^2
9=r
Step 2: plug in radius to the circumference equation
Circumference = 2pi*r
18pi is the answer, otherwise know as 56.52 as well.
Formula 1 mi =in * 63,360
So 0.9*63,360= 57024 inches
