PLEASE HELP Arron had 7 boards measuring 2 1/4 ft. each. How long are all the boards if placed end to end? Just put the answer not feet.

1. writing an equation for an exponential function by 2. a piece of paper that is 0.6 millimeter thick is folded. write an equation for the thickness t of the paper in millimeters as a function of the number n of folds. the equation is t(n)= 3. enter an equation for the function that includes the points. (-2, 2/5) and (-1,2)