$10$ days ago the first patient was infected. Today, $100$ people are currently sick. How many people will be infected in $20$ days?

A$.100,000$

B$.250,000$

C$.500,000$

D$.1,000,000$

E$.5,000,000$

How long will it take sales to triple if the interest rate is $10\%$ per year?

A$.14\mathrm{.}32$ years

B$.9\mathrm{.}87$ years

C$.10\mathrm{.}78$ years

D$.11\mathrm{.}53$ years