The population of medfield is 7000. capital city's population is 8/25ths of medfield's. what is capital city's population?

a.280
b.2240
c.21,875
d.56,000

Charlie is at an amusement park that has 18 different rides. each ride costs $1.75. the function c(r) = 1.75r represents the total amount of money that charlie will spend if he goes on r rides, but he never goes on the same one more than once. what domain and range are reasonable for the function?