Matt had 3 piles of coins, A, B and C.

Altogether there was 72p.

Pile B had twice as much as pile A.

Pile C had three times as much as pile B.

How much money was in Pile C

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

Asales representative from a local radio station is trying to convince the owner of a small fitness club to advertise on her station. the representative says that if the owner begins advertising on the station today, the club's total number of members will grow exponentially each month. she uses the given expression to model the number of club members, in hundreds, after advertising for t months.

The input to the function is x and the output is y. write the function such that x can be a vector (use element-by-element operations). a) use the function to calculate y(-1.5) and y(5). b) use the function to make a plot of the function y(x) for -2 ≤ x ≤ 6.