Answer:
A=150(1+2)^4
Explanation:
Look up the compound interest formula, this is how you solve the problem.
A=P(1+r/n)^(nt)
A=150(1+(300%-100%)/1)^(1)4
A=150(1+2)^4
A=12150
If you have any questions about the math please feel free to ask. Have a nice day.