Construct a 90% confidence interval for the population mean. Assume the population has a normal distribution. A sample of 15 randomly selected math majors has a gpa of 2.86 with at standard deviation of 0.78.

The floor plan of a room has a scale of 2.5 in.: 35 ft. in the drawing, the length of the room is 8 in. and the width of the room is 6 in. what is the perimeter of the actual room?

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?

What is a correct first step in solving the inequality-4(3-5x)> -6x+9