A road sign at the top of the mountain indicates that for the next 4 miles to grade is a 12%. find the angle of the great and the change in elevation for a car descending the Mt.

Alright, this is a tricky one!

First, you need to assume that by giving up your full-time salary of $45k, you will be taking a loss of $45k per year. Therefore, because you're going to school for 2 years - you'll have a loss of $90k.

Then, from there you take out a loan for $30k for school. With the addition of your student loan, you're now in debt / at a loss of $120k. Therefore, you're total investment is $120k. Divide that by 5 years, and you get $24k.

Lastly, you have to consider your original annual salary of $45k with the addition of your recover investment per year of $24k. That would be $45k + $24k = $69k. Therefore, the minimum salary you would need to earn upon earning your degree would be $69k.

I believe the answer is C.