Here's what I got. I've explained the work, but sorry for being slow.
Answer:
a^-27
Step-by-step explanation:
the numbers up top have to be multiplied.
1*3*-9=-27
No it is not. The formula to find simple interest is Interest=Prt (p= main amount of money $300) (r= rate of interest which WOULD be a percent but is not there) (t= time aka 2 years)