The equation y=20-3^t shows the number of infected people from an outbreak of whooping cough.
The variable y represents the number of infected people, and t represents time in weeks.
In how many weeks will the number of infected people reach 1,000?
O
a.) 2.45 weeks
b.) 3.56 weeks
Oc.) 3.24 weeks
d.) 2.88 weeks