eric can paint a fence twice as fast as his sister can. working together, they can paint a fence in 6 hours. how many hours would it take each of them working alone?

Suppose the probability of selling a car today is 0.28. find the odds against selling a car today.

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

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m