Math
posted by Alex .
. Jacksonville Technical College received $3,445,553 in state aid on September 15 for the fall academic semester. The vicepresident for finance decided to invest $2,000,000 in a 2month investment that pays 11.5% simple interest. How much interest will the college earn on the investment? For this one the interest earned would have been 38333.33
2.Barney Casey borrowed $40,000 from his parents for 2 years. He paid them a total of $45,000 at the end of the 2year term of the simple interest loan. What rate of interest did he pay his parents? The answer I came up with was 6.25 percent.
3.Sarai Sherman agreed to deposit $4,450 in an account paying 16% simple interest per year for 60 days. If she made the deposit on February 25, determine (a) the date of the end of the term of the investment, and (b) the ordinary interest Sarai will earn. A)is either 25 or 26 April depending if it is a leap year. B)Interest earned would have been 117.04 if using 365 days per year or 117.36 for 364 days.
I just want to make sure my answers are correct before I turn them in to my teacher again. Thank you

2000000*.115/12*2 = 38333.33
40000*(1+2r) = 45000
r = .0625
A) I'd say either 25 or 24 April, since the extra day in Feb. comes off the end date.
B) 4450*.16/365*60 = 117.04
Looks like you have a good handle on this topic! 
Thanks, I did finally get the hang of it after I turned it in the first time with all of those wrong. I don't know how I messed up on it so poorly.