The mean of 8 numbers is 12.Five of the numbers are 6, 8, 5, 10 and 28.The remaining three numbers are each equal to k. Find (i) The sum of the 8 numbers.
(ii) The value of k.

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)