8. Darren sells two bottles of wine for \( \$ 11880 \) each. He gains \( 10 \% \) on one and loses \( 10 \% \) on the other. After the two transactions, Darren A. loses \( \$ 108 \). B. loses \( \$ 240 \). C. gains \( \$ 132 \). D. has no gain and no loss.

In account executive deposited \( \$ 36,000 \) into two simple interest accounts. On the tax-free account the annual simple interest rate is \( 2.5 \% \), and on the money market fu he annual simple interest rate is \( 3.5 \% \). How much should be invested in each account so that both accounts earn the same annual interest? tax free account \( \$ \) money market \( \$ \)

Suppose that in 1671, a man bought a diamond worth the equivalent of \( \$ 36 \). Suppose that the man had instead been able to put the equivalent of \( \$ 36 \) in a bank at \( 3 \% \) interest compounded continuously. What would that \( \$ 36 \) have been worth in 2003?

III.- Resuelve los siguientes problemas 1. Inicia una infección zombie con 5 personas infectadas, en la cual el virus se triplica por cada hora que pasa ¿qué cantidad de personas estarán infectadas después de media hora, 2 horas y un dia? 2. El número de bacterias de un cultivo es de 250 , si estas se triplican por hora ¿Cuántas bacterias habrá en 5,10 horas y en uno y dos dias? 3. Una persona invierte \( \$ 25000 \) en un banco con un interés mensual del \( 4 \% \), ¿Cuánto dinero tendrá después de \( 3,9,12 \) y 18 meses? 4. Determina qué opción es mejor si invertir \( \$ 100000 \) a 3 meses con un interés del \( 4 \% \) o \( \$ 50 \) 000 a 10 meses con un interés del \( 2.5 \% \).

Larissa invested \( \$ 19,000 \) in an eleven-year CD giving \( 7.5 \% \) interest, but needed to withdraw \( \$ 2,500 \) after four years. If the CD's penalty for early withdrawal was one year's worth of interest on the amount withdrawn, how much money did Larissa have when the CD reached maturity, not including the amount she withdrew? a. \( \$ 13,612.50 \) b. \( \$ 30,675.00 \) c. \( \$ 30,112.50 \) d. \( \$ 14,175.00 \)

4. A hoverboard is on sale for \( 10 \% \) off the original price of \( \$ 247.50 \)