Question

If r=4 units and x = 8 units then what is the volume of the cylinder shown above use 3.14 for TT and round your answer to the nearest hundredth

Answer 1

To answer this you will use the formula V = pi x radius ^2 x height.  The substitution for this would be 3.14 x 4^2 x 8.  The approximate answer is 401.92 cubic units. 3.14 is an approximation of pi. 
 
Note:  It does not say that x is the height, but this is the only piece of information missing without an obvious label, so I am using it as the height.