If i put £300 into a building society for one year, at an interest rate 4% per annum, what will it be worth at the end of the year

Let f(x) = 3 − x . find the average rate of change of f(x) from x = a to x = a + h and simplify your answer so that no single factor of h is left in the denominator.

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25

To decrease an amount by 16% what single multiplier would you use