Someone please help me!!

Astore sells two types of radios. one type sells $87 and the other for $119. if 25 were sold and the sales were $2495, how many of the $87 radios were sold a) 5 b) 20 c) 15 d)10

The function f(x) = 14,600(1.1)* represents the population of a town x years after it was established. what was the original population of the town?

Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2