And this is the last one i need done

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.

Find an bif a = {3, 6, 9, 12) and b = {2, 4, 6, 8, 10).