Question

A telephone company makes up it's monthly bills as follows:a fixed charge of #800 plus a charge proportional to the number of units of call on the telephone.if it charges #2 per unit of call,calculate the total charge on A)80 units
B)150 units
C)782 units

Answer 1

(A) The total charge on 80 units = $960

(B) The total charge on 150 units = $1100

(C) The total charge on 782 units = $2364

Step-by-step explanation:

We are given that a telephone company makes up it's monthly bills as follows: a fixed charge of $800 plus a charge proportional to the number of units of call on the telephone. If it charges $2 per unit of call.

Let the units of call on the telephone be x units.

So, the cost function is represented by;

Total charge = 800 + 2x     {where x is number of units of call}

(A) Given x = 80 units of call on the telephone.

So, Total charge = 800 + 2(80)

                            = 800 + 160 = $960

(B) Given x = 150 units of call on the telephone.

So, Total charge = 800 + 2(150)

                            = 800 + 300 = $1100

(C) Given x = 782 units of call on the telephone.

So, Total charge = 800 + 2(782)

                            = 800 + 1564 = $2364