Question $3$

You decide to have a million dollars $40$ years from now. How much should you deposit at the end of every month in an annuity that pays $7\mathrm{.}5\%$ per year compound monthly to achieve your goal?

Question $4$

An investment looses $30\%$ of its value on its first year. On the second year, the investment sees gains of $50\%.$ Is it correct to say that the investment returned a gain of $20\%$ over a two$-$year period? Explain.