For every four magazines Wanda sells during the book drive, she gets 50 cents commission.
If she makes a total of $20.50, how many
magazines does she sell?
A) 40
B) 41
C) 161
D) 164

Proceed as in example 3 in section 6.1 to rewrite the given expression using a single power series whose general term involves xk. ∞ n(n − 1)cnxn − 2 n = 2 − 4 ∞ ncnxn n = 1 + ∞ cnxn n = 0

Will gve pints stars and brainliest

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup