If $1,000 is invested in an account that pays 4% interest compounded annually, an expression that represents the amount in the account at end of three years can be given by which of the following equations?
a. 1000+0.4^3
b. 1000(0.3)^3
c. 1000(1.04)^3

Let's see here... the answer is C just by using common sense. A doesn't make sense because you can't cube .4, as it is a percentage, and you wouldn't add that to 1000. B makes no sense because the percentage you are using is 4%, not 30%. Of course, just be sure to fact-check me there.

T = 2.75N +150
So E is the correct answer