The formula for the volume of a cylinder is v = πr2h. the volume of a cylinder is three times the volume of a cone with the same radius and height.
if the volume of a cone with the same height as a cylinder equals the volume of the cylinder, the equation for the radius of cone r in terms of the radius of cylinder r is
.

Step-by-step explanation:

The formula of a volume of a cylinder:

The formula of a volume of a cone:

The volume of a cone is equal the volume of a cylinder.

Therefore we have the equation:

    divide both sides by πh

          multiply both sides by 3

step-by-step explanation:

f(x)=2x^2 -1 

translation is a function transformation that transform the function in a way of translating. by translating the function its graph is moved  up an down. moving the function f(x) 2 units to the left will be the new function g(x) with the equation: g(x)=f(x+2)=2(x+2)^2 -1

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.