#### Answer

a. This is impossible to solve as the business hasn't been in operation for over 5 years.
b. 0%
c. 10 years

#### Work Step by Step

a. Business is only in operation for 1 year... This is impossible to solve as the business hasn't been in operation for over 5 years.
b. t=25
$P=-3(25)+50$
$P=-75+50$
$P=-25$
$P=0$ because you can't have a negative %.
c. P=35
$35=-3(t)+50$
$35-50=-3(t)$
$-15=-3(t)$
$-15\div-3=t$
$t=5$ so 5+5=10