SOLUTION: I really need help!!!!! In 1987 17.6% of high school grades for college freshman consisted of A's (A+, A, or A-). On average, this has increased by approximately 0.83% per ye

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Question 406251: I really need help!!!!!

In 1987 17.6% of high school grades for college freshman consisted of A's (A+, A, or A-). On average, this has increased by approximately 0.83% per year.
Write a formula for the nth term of the arthmetric sequence that models the percentage of high school grades of A for college freshman n years after 1967.
B.trends shows by the model in part (a) continue, what percentage of high school grades for college freshman will consist in 2018?

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!

Hi
a%5Bn%5D=a%5B1%5D%2B%28n-1%29%2Ad
a%5B20%5D=a%5B1%5D%2B%2819%29%2A.83+=+17.6+ | 1968 -1987
a%5B1%5D=+17.6+-+%2819%29%2A.83+=+1.83+
a%5B51%5D=+1.83%2B%2850%29%2A.83+=+43.33+ |1968-2018