Answer:
F=P(1+(r/n))^(nt)
F=future amount
P=present amount
r=rate in decimal form
n=number of times per year it is compounded
t=time in years
F=P(1+(r/n))^(nt)
F=future amount
P=300
r=0.09
n=1
t=3
F=300(1+(0.09/1))^(1(3))
F=300(1+0.09)^(3)
F=300(1.09)^(3)
F=388.509
it would be worth $388.51 (rounded)