Answer:
The Equation for this is given as
C = $0.99x + $1.50
Where x = number of minutes
C = Cost of the call
If you have $51 to spend , the duration of the call is approximately 50 minutes
Step-by-step explanation:
Step 1
The difference in the cost of the calls is calculated as:
$11.40 - $6.45
= $4.95
The cost for a 5 minute call is calculated as:
$4.95 ÷ 5 = $0.99
Extra charges for the 5 minutes call =
$6.45 - $4.95 = $1.50
The Equation for this is given as
C = $0.99x + $1.50
Where x = number of minutes
C = Cost of the call
If you have $51 to spend, the number of minutes you would get is :
$51 = $0.99x + $1.50
$51 - $1.50 = 0.99x
$49.50 = 0.99x
x= $49.50/0.99
x = 50 minutes
Therefore, If you have $51 to spend , the duration of the call is approximately 50 minutes.
