A cellular phone company offers several different service options. One option, for people who plan on using the phone only in emergencies, costs the user $4.65/month plus $0.54/min for each minute the phone is used. Write a linear function for the monthly cost y (in dollars) of the phone in terms of the number of minutes x the phone is used. y= Use the function to find the cost (in dollars) of using the cellular phone for 19 minutes in 1 month. $

A cellular phone company offers several different service options. One option, for people who plan on using the phone only in emergencies, costs the user $4.65/month plus $0.54/min for each minute the phone is used. Write a linear function for the monthly cost y (in dollars) of the phone in terms of the number of minutes x the phone is used. y= Use the function to find the cost (in dollars) of using the cellular phone for 19 minutes in 1 month. $

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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The owner of a local hair salon is planning to raise the price for a haircut and blow dry. The current rate is $30 for this service, with the salon averaging 550 clients a month. A survey indicates that the salon will lose 5 clients for every incremenetal price increase of $2.50. a. Write an equation to model the salon’s monthly revenue, R, in dollars, as a function of x, where x represents the number of $2.50 increases in price. b. Use the product rule to determine R’(x). c. Solve for R’(x) = 0.
The thickness of ice y in the Gladstone Glacier was 450 feet in 1990. By 2005, the thickness had shrunk to 400 feet. Let x be the elapsed number of years since 1990. Write a linear function that models this data. Then use the function to find the given value. (Simplify your answer and round to TWO decimal places, including zeros as needed. Example: 2 should be written as 2.00. Do not include commas.) Estimate the year when the Gladstone Glacier will be 350 feet thick. (Round your answer to TWO decimal places, including zeros as needed. Example: 2 should be written as 2.00. Do not include commas.)
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A user is charged P500.00 monthly for a particular mobile plan, which includes P150.00 free text messages. Messages in excess of 150 are charged P1.00 each. Represent the amount a consumer pays each month as a function of the number of messages m sent in a month.
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