Simplify the expression (5x^2y^-5)^-3

How long would it take for a ball dropped from the top of a 576-foot building to hit the ground? round your answer to two decimal places.

Gregory draws a scale drawing of his room. the scale that he uses is 1 cm : 4 ft. on his drawing, the room is 3 centimeters long. which equation can be used to find the actual length of gregory's room?

60 musicians applied for a job at a music school. 14 of the musicians play both guitar and drums. what is the probability that the applicant who gets the job plays drums or guitar?