Can anyone answer this questionin 4 Step I'll mark that person has branily please

Negative 5 1/12 + negative 4 1/4 + 6 3/4

Which of the following is the result of expanding

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)