Answer:
i think it might be A
Step-by-step explanation:
I will assume monthly compound interest.
Then:
yearly interest: 12%
monthly interest = (3/12) %
invested money: C
Final money: 2C
n: number of months
Compund interest formula:
Final money = Invested money * (1 + 0.03/12)^n
2C = C * (1.0025)^n
2C/C = (1.0025)^n
2 = (1.0025)^n
n = log(2) / log (1.0025)
n = 277.6 months
Time = 278 months = 23.1 years
I got 5x^2 - 30x................
Simple,
since he has no money to begin with just write your equation..
E=6s
Which basically means, if he sells 1 shirt:
E=6(1)
E=$6
If he sells 2 shirts:
E=6(2)
E=$12
And so on and so forth, thus, your equation is E=6s.