Please help me out with this algebra2

Answer:
Step-by-step explanation:
a.) S(t)=9t-4
S(4)= 9(4)-4
= 36-4
S(4)=32
b.) S(4) means the number of people who got the flu in 4 days.
c.) S(t)=23 t=23/s
d.) I'm not sure on this one. S(t)=23 means 23 people got the flu in t days
e.) Choose values as inputs- these will be your x values, your putput will be the y.
I think I did this right, Hope this helps :)