jack knows the surface area of a cylinder and its radius. He wants to find the cylinder height. He needs to rewrite the formula A= 2pie r (r + h ) to find the cylinder's height (h) in terms of the cylinder's surface area (a ) and its radius (r). which is the correct formula

Renaldo and nasreen build an electromagnet by wrapping a wire around a nail and connecting the wire to both terminals of a battery. when they test the electromagnet, it can pick up 6 paper clips. their teacher wants all groups to pick up at least 10 paper clips. what could renaldo and nasreen do to increase the number of paper clips their electromagnet picks up?