Need a grl to quick rp?

Reflect the point (7,0) across the y-axis

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

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?