Use A^2+B^2=C^2 to get 20.2
454=450
289=290
2,964=2,960
4 or less then let it rest 5 or more then let it soar is a helpful ryhme for rounding.
Answer:

Step-by-step explanation:
In order to find the area of a circle we multiply π by the radius, and to find the radius of a circle we have to look at the line that stops directly in the middle of the circle.

Once we then have the radius, we simply multiply the radius, (with an exponent of 2) by π and then we will have our answer. Of course, round if needed.

Hope this helps.
Its 1 quattordecillion or 1(48 zeros that I don't want to type)
Answer:
30 inches
Step-by-step explanation:
240/20=12
12x2.5=30