To pay for an \( \$ 18,500 \) motorcycle, Chris made a down payment of \( \$ 4500 \) and took out a loan for the rest. On the loan, he paid monthly payments of \( \$ 309.89 \) for 4 years. \( \begin{array}{ll}\text { (a) } \begin{array}{l}\text { What was the total amount chris ended up paying for the motorcycle } \\ \text { (including the down payment and monthly payments)? } \\ \$ \square\end{array} \\ \text { (b) How much interest did Chris pay on the loan? }\end{array} \)

Michelle invests in a savings account that pays \( 8 \% \) interest compounded monthly. What is the APY for this account? \( \square \) Round to the nearest \( 0.00 \% \)

Find the time required for an investment of 3,000 dollars to grow to 12,000 dollars at an interest rate of \( 7 \% \) per year, compounded monthly. Give your answer accurate to 2 decimal places. \( \square \) years.

How much money must you invest now at \( 4.6 \% \) interest compounded continuously in order to have \( \$ 10,000 \) at the end of 6 years?

How much would you need to deposit in an account now in order to have \( \$ 5000 \) in the account in 10 years? Assume the account earns \( 2 \% \) interest compounded monthly.

21.- Un fabricante vende un producto a \( \$ 5,00 \) por unidad, vendiendo todo lo que produce, el costo fijo es \( \$ 3.000 \) y el variable por unidad es de \( 15 / 4 \) de q. La producción y el ingreso total en el punto de equilibrio es: a. 200 unidades y \( \$ 1.000 \) b. Ninguna es correcta (demostrar) I. c. 2.400 unidades y \( \$ 12.000 \) d. 500 unidades y \( \$ 2.000 \)