Calculate the curved surface area of cylinder of radius 14cm and of height 9cm.

If f(x)=2x+2and g(x)=x^3, what is (g•f)(2)

An investment decreases in value by 30% in the first year and decreases by 40% in the second year. what is the percent decrease in percentage in the investment after two years

3. a sum of $2700 is to be given in the form of 63 prizes. if the prize is of either $100 or $25, find the number of prizes of each type.