Sometimes it is advantageous to express a value in round numbers. To round to a particular place, look at the digit immediately to the right of the one you want to round to, in this case, the hundredths place. If that digit is 4, 3, 2, 1 or 0, zero it and everything to the right of it out. If that digit is 5, 6, 7, 8 or 9, increase your target digit by one and zero everything to the right of it out. If your target digit is 9, it will become a zero and increase the digit to the left of it by one.
71.0
37 to the nearest tenths = 37.0
The answer is 8.4
Radius is the square root of (71/pi) = 4.8 feet rounded to the nearest tenth
71.0
If you're rounding to the nearest whole number, it's roudned to 37. If you're rounding to the nearest tenth, its 36.6.
37.0
You would round it up.... to 37 or 37.0
7.0
37% of 71 = 26.27
37.4
3.9356 to the nearest tenth is 3.9