$1.$How long would it take for $$800$ to grow to $$2,000$ at an $8\%$ interest rate? $2\mathrm{.}5$ years $3$ years $12$ years between $40$ and $50$ years

$2.$If you invest $$1,000$ today and receive $$4,000$ at the end of $18$ years, what is your annual rate of return?

$8\%$

$25\%$

$300\%$

$400\%$