4. find the final amount in the following retirement account, in which the rate of return on the account and the regular contribution change over time. $1000 per quarter invested at 4.7%, compounded quarterly, for 11 years; then $1700 per quarter invested at 7.9%, compounded quarterly, for 16 years. find the final amount in the account. $ not round until the final answer. then round to the nearest dollar as needed.)

m∠a is 90°

m∠b is 40°

change of stock price/initial stock price on friday * total stock value = change of stock value

0.89/73.73 *x = 42.72

x=3539.04 = total stock value at initial stock price on friday .

total stock value at initial stock price on friday/ initial stock price on friday = number of shares

3539.04/73.73 = 48 shares

they own 48 shares of this stock

you first to choose the points and then move from then as the slope you have