Question

Write S25=5(1−0.225)(1−0.2)
in sigma notation.(2 points)
$$
Remaining Attempts : 3

Answer 1

I think you mean product (capital Pi) notation rather than sigma. Two equivalent compact forms:

S25 = 5 ∏_{n=1}^{25} (1 − (0.225 − 0.025(n−1)))

which simplifies to

S25 = 5 ∏_{n=1}^{25} (0.75 + 0.025n).

(If you really need a sigma form, use logs: S25 = 5 · exp(∑_{n=1}^{25} ln(0.75 + 0.025n)).)