a)malak is considering investment online publishing company and needs to work the presetn value . she expects to receivre a cash flow of 100,000$ after 4 years at a 15% annual return . Find out the present value of this investment.

b)For y=f(x)=x^3+2x^2+3x when x=3.

i.Determine the relative rate of change.

ii. Determine the percentage rate of change.