A Susan B. Anthony dollar coin has a diameter of 26.50 millimeters. What is the area of the coin to the nearest hundredth?
Coin's diameter is 26.50 millimetres
using the unit of measurement of
So its radius is
Area of a circle is
So the area is
Using a calculator this is: 551.54586....
For the nearest hundredth we have the cut off point:
The digit immediately to the right of the cut of point is classified as 5 or more. So the digit to the left of the cut off point is raised by 1 and all those to the right made into 0