Need help:

$1.$ Solve for the unknown interest rate in each of the following: $($Do not round intermediate calculations and enter your answers as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

Present Value:

$$310$

$$430$

$$46000$

$$45261$

Years

$5$

$19$

$20$

$30$

Future Value

$$418$

$$1553$

$$269914$

$$1285194$

$2.$ Although appealing to more refined tastes, art as a collectible has not always performed so profitably. During $2003,$ Sotheby$$s sold the Edgar Degas bronze sculpture Petite Danseuse de Quatorze Ans at auction for a price of $$10,331,500.$ Unfortunately for the previous owner, he had purchased it in $2000$ at a price of $$12,417,500.$ What was his annual rate of return on this sculpture? $($A negative answer should be indicated by a minus sign. Do not round intermediate calculations and enter.

$3.$ Solve for the unknown number of years in each of the following: $($Do not round intermediate calculations and round your answers to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

Present Value:

$$660$

$$910$

$$19400$

$$22500$

Intertest Rate

$8\%$

$12\%$

$18\%$

$14\%$

Future Value

$$1604$

$$2671$

$$418534$

$$425658$

$4.$You're trying to save to buy a new $$208,000$ Ferrari. You have $$58,000$ today that can be invested at your bank. The bank pays $6\mathrm{.}6$ percent annual interest on its accounts. How long will it be before you have enough to buy the car? $($Do not round intermediate calculations and round your answer to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$