Katie wants to lock her bike in the bike rack near the school and there are 7 spots still open. She arrives at the same time as 3 other students. How many ways can the 4 children rearrange their bikes in the 7 open spots?

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?

Adecibel is a logarithmic unit that can be used to measure the intensity of a sound. the function y = 10logx gives the intensity of a sound in decibels, where x is the ratio of the intensity of the sound to a reference intensity. the reference intensity is generally set at the threshold of hearing. use the graphing utility to graph the decibel function.a whisper has a sound intensity of 30 decibels. use your graph to you complete the following statement. the sound intensity of a whisper is times the reference intensity.

Mis the midpoint of rq if rm equals 2x + 5 and mq equals 4x - 9 what is the length of rq