Ok help So my grade rn in science is a 80 (a B) and i need to get it up to an A and if i just turned in a test and got an 100 but an 80 on another one and a 100 on an assignment, will that get my grade up to an A or still B??

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?