Question

What is the approximate volume of a cylinder with a height of 5 ft and a radius of 9 ft?

Answer 1

The volume of a cylinder is pi x r^2 (squared) x h.
H = Height
R = Radius.
Let's replace the letters with our numbers for this problem. (5, 3.14, 9)
Our new problem is 3.14 x 9^2(squared) x 5.
Now, what is 9 squared? We can get this by multiplying our number by itself. 9^2 (squared) = 9 x 9. 9 x 9 = 81. Now our problem is.
3.14 x 81 x 5. Now let's get our calculators out! 
3.14 x 81 = 254.34. - 254.34 x 5 = 1271.7
In order to make our answer as a decimal to the hundredths place, we have to add a 0 to the right of our 2nd 7 (in the tenths place). 1271.70 can also be written as 1271.7. 
Your answer is: 1271.70