Marion is filling a mold with liquid aluminum alloy to create a replacement part for a large-scale printing machine. He knows he needs to pour 81.64 cubic inches into the mold, but he does not have a marked measuring cup. If all of the cylindrical containers he has have radiuses of 2 inches, how tall would the cylinder have to be to have a volume of 81.64 cubic inches?

Step by step explanation pls for 10 pts the length of a rectangular board is 3 feet less than twice its width. a second rectangular board is such that each of its dimensions is the reciprocal of the corresponding dimensions of the first rectangular board. if the perimeter of the second board is one-fifth the perimeter of the first, what is the perimeter of the first rectangular board?