How long will it take for a \( \$ 4000 \) investment to grow to \( \$ 13,492 \) at an annual rate of \( 8 \% \), compounded semiannually? Assume that no withdrawals are made. Do not round any intermediate computations, and round your answer to the nearest hundredth.

What is the approximate balance after 20 years? Choose the correct answer below. \( \begin{array}{ll}\text { A. } \$ 200 & \text { B. } \$ 400 \\ \text { C. } \$ 100 & \text { D. } \$ 10 \\ \text { b) About how fast is the balance increasing after } 20 \text { years? } \\ \text { Choose the correct answer below. } \\ \begin{array}{ll}\text { A. } \$ 5 / y e a r & \text { B. } \$ 200 / y e a r \\ \text { C. } \$ 20 / y e a r & \\ \text { c) Use the answers to parts a) and b) to determine the interest rate. }\end{array} \\ \text { The interest rate is } \square \% .\end{array} \)

\begin{tabular}{ll|l|}\hline A. UNA SERIE DE PAGOS MESUALES SE INICIA HOY CON UN AHORRO DE \( \$ 50.000 \) EN EL MES 1 DE \( \$ 60.000 \), EN \\ EL MES \( 2 \$ 70.000 \) Y ASI SUCESIVAMENIE HASTA LLEGAR A EL MES 23. PARA UNA TASA DE INTERES DEL \( 32 \% \) \\ \hline\end{tabular}

camera has a listed price of \( \$ 779.98 \) before tax. If the sales tax rate is \( 9.75 \% \), find the total cost of the camera with sales tax included Round your answer to the nearest cent, as necessary. \$ \( \square \)

Find the present value of \( \$ 7,000 \) to be received in 5 years, if money may be invested at \( 7.2 \% \) with interest compounded continuously. The present value is \( \$ \square \). (Round to the nearest cent as needed.)

2 Jane sells jewellery. Her weekly commission is based on a sliding scale of \( 9 \% \) on the first \( \$ 2500 \) of her sales, \( 5 \% \) on the next \( \$ 5000 \) and \( 1 \% \) thereafter. She also gets a weekly retainer of \( \$ 500 \) Jane's weekly commission