How to find the radius of a cone from only the height and volume

What is the equation and solution for the sentence? the sum of a number and thirty-one is one hundred thirteen. write the equation as n-31=113 and subtract 31 from both sides. the answer is 82. write the equation as n+31=113 and subtract 31 from both sides. the answer is 82. write the equation as n+31=113 and add 31 to both sides. the answer is 144. write the equation as n-31=113 and add 31 to both sides. the answer is 144.

What is the order of magnitude for the number of liters in a large bottle of soda served at a party

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)