Mathemat
Assessme
9. Hakim
that
at the
7. Luisa buys a plane ticket that has an
original price of $240. She uses a coupon
code to get a 30% discount off of the
original price. She is then charged a 7%
tax on the discounted price.
25.
What is the final cost for Luisa's plane
ticket?

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.