The monthly cost of a certain long distance service is given by the function C(t) = 0.05t + 7.95 where c(t) is in dollars and t is the amount of minutes used in a month. Find and interpret c(190).
To find c(190), we substitute t = 190 into the equation C(t) = 0.05t + 7.95:
C(190) = 0.05(190) + 7.95
C(190) = 9.5 + 7.95
C(190) = 17.45
Therefore, c(190) is $17.45.
This means that if 190 minutes are used in a month, the monthly cost for the long distance service would be $17.45.
To find and interpret C(190), we will substitute t = 190 into the function C(t) = 0.05t + 7.95.
C(t) = 0.05t + 7.95
C(190) = 0.05(190) + 7.95
C(190) = 9.5 + 7.95
C(190) ≈ 17.45
Therefore, when 190 minutes are used in a month, the monthly cost is approximately $17.45.