Afriend of yours is considering two providers of cell phone services. provider a charges $120 per month for the service regardless of the number of phone calls made. provider b does not have a fixed service fee but instead charges $1 per minute for calls. your friend’s monthly demand for minutes of calling is given by the equation qd= 150 – 50 p, where p is the price of a minute. a. with each provider, what is the cost to your friend of an extra minute on the phone? b. in light of your answer to (a), how many minutes would your friend spend on the phone with each provider? c. how much woul

proportions are fractions that equal to each other. so if two fractions are the same, they are proportional.

let's check the answers to see if they are proportional.

question a is not proportional because you can't turn 1.5/3 to 3/9. if you try to multiply 1.5/3 by 2 or 3, you wont get 3/9. it's impossible to make the fractions the same.

question b is not proportional because you can't turn 22/33 to 4/6. 33 can't go into 6.

question c is proportional because when you multiply 2 and 3 by 71, you would get 142/213, and those fractions equal to each other

question d is proportional because when you divide 14 and 7 by 2, you would end up with 7/3.5, and those fractions equal to each other.