Respuesta :
Answer:
S(t) = 1.5 sin(Ï€t/60.83) + 3.47
Step-by-step explanation:
S(t) = a.sin(b.t) +d
Average value at 0 day = 3.47
Therefore d = 3.47
with t at 91.25 days, the value is down it minimum = 1.97
i.e. d - a = 1.97
a = d - 1.97
= 3.47 - 1.97
a = 1.5
at t = 91.25
bt = 3Ï€/2
b= 1.5[tex]\pi[/tex]/t
b = 1.5[tex]\pi[/tex]/91.25
b = [tex]\pi[/tex]/60.83
S(t) = 1.5 sin(Ï€t/60.83) + 3.47