The Smith family has a cell phone plan that costs $75 per month. The plan lets 5 members of the Smith family share 1,000 minutes to talk per month and 400 text messages per month. Any minutes over 1,000 cost $1 per minute and any texts over 400 cost $2 per text. There was a family emergency so the smith family uses 1050 minutes and 415 texts in the month of March. Part A writes a math expression that you could use to find the amount of the Smith cell phone bill for the month of March.

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.