Answer:
12. $142,857.14
13. $77,704.82 . . . it is changed by the accumulated interest on the amount
Step-by-step explanation:
12. You want one year's interest on the endowment to be equal to $10,000. The principal (P) can be found by ...
I = Prt
10,000 = P·0.07·1
10,000/0.07 = P ≈ 142,857.14
The endowment must be $142,857.14 to pay $10,000 in interest annually forever.
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13. If the first award is in 10 years, we want the above amount to be the value of an account that has paid 7% interest compounded annually for 9 years. (The first award is 1 year after this amount is achieved.) Then we want the principal (P) to be ...
142,857.14 = P·(1 +0.07)^9
142,57.14/1.07^9 = P = 77,704.82
The endowment needs to be only $77,704.82 if the first award is made 10 years after the endowment date.
