At an airport, it cost $7 to park for up to one hour and $5 per hour for each additional hour. let x represent the number of hours parked. write the function that models the cost, c(x), of parking x hours, where x is an integer greater than 1.

The sat and act tests use very different grading scales. the sat math scores follow a normal distribution with mean 518 and standard deviation of 118. the act math scores follow a normal distribution with mean 20.7 and standard deviation of 5. suppose regan scores a 754 on the math portion of the sat. how much would her sister veronica need to score on the math portion of the act to meet or beat regan's score?

If the scale factor between two circles is 2x/5y what is the ratio of their areas?

The students in a class were asked how many siblings they have. the data obtained is represented in the dot plot. the number of students who have no siblings is . the number of students who have three or more siblings is .