The answer depends on what the number 0.45 refers to: radius, diameter or area?
3.74
11.70
The square root of 4 is 2
The circumference of a circle with radius of 7 km is 44.0 km (to the nearest tenth), and the area of a circle with radius of 7 km is 153.9 km (to the nearest tenth).C = 2 pi RA = pi R2
Sqrt(27.05) is one such number. Its decimal approximation, to the nearest hundredth, is 5.20 - but to the nearest thousandth is is 5.201
47.25
If you have the radius, then area = pi*r2 which you then round to the nearest hundredth. If you do not know the radius but do know the diameter or circumference, you can calculate the radius. Otherwise you need to measure it.
Circumference = pi * 2 * r C = 3.14 * 2 * 47 = 295.16
For circumference, multiply the diameter by pi and round the product to the second decimal place. For area, multiply the square of the radius by pi and round the product to the second decimal place.
You find the hundredth place then look at the number behind it. If its greater than 5, round up. If not, round down
16.6 x pi = 52.15 to the nearest hundredth
Round your answer to two decimal places. Example: Your calculator's answer is 2.133334442 You round to: 2.13
Circumference of a circle = 2*pi*radius or pi*diameter Circumference = 21.67698931 or 21.7 meters to the nearest tenth
to find the raduis of any circle, divde the diameter by 2. in this case, the answer would be 3.50
21.99
If the radius is 6 units, the diameter is 12. To find the circumference, you multiply the diameter by pi to get 12pi or 37.699, which rounds up to 37.70.
35.35 sq un