HELP ASAP PLEASE. Find the volume of the cylinder. Find the volume of a cylinder with the same radius and double the height

The volume of the cylinder is __ in.³.

The volume of a cylinder with the same radius and double the height is __ in.³.​

Each month, a shopkeeper spends 5x + 14 dollars on rent and electricity. if he spends 3x−5 dollars on rent, how much does he spend on electricity? for which value(s) of x is the amount the shopkeeper spends on electricity less than $100? explain how you found the value(s).

Prove that quadrilateral is a rhombus.

Solve each quadratic equation by factoring and using the zero product property. 10x + 6 = -2x^2 -2