q$\mathrm{.}2$ You bought an artwork $19$ years ago, the current estimated price is $$19,168,$ which reflects an annual return of $17$ percent. For this to be true, what was the original price of the artwork? Answer: $

q$\mathrm{.}3$ An investor bought a set of antique furniture at a price of $$13,439$ in $2,009.$ In $2,020,$ he sold it at a price of $$10,805.$ What was his annual rate of return for this investment? Answer: $\_\_\_\_\_\%$

q$4$ When you were little, your family deposited $$2,480$ into a savings account paying $9$ percent interest, compounded annually. How many years after, the savings account will be worth $$6,315$ to help pay for your college? Assume there are no additional deposits or withdrawals. Answer: $\_\_\_\_\_\_$ years. $($Do not round intermediate calculations and round your answer to $2$ decimal places$)$