Answer:
In both the cases, the given total amount is given as:
T = 10 + 0.05 m (when minutes talked m < 600)
T = 40 + 0.15 k (when minutes talked k > 600)
Step-by-step explanation:
Here, the flat fee by the phone company = $10
The charge for each minute for first 600 minutes = $0.05
The per minute cost after 600 minutes = $0.15
Let us assume the number of minutes talked = m
<u>Case 1:</u><u> when the minutes talked is less than 600 minutes.</u>
Total Charges = Flat Fee + 0.05 x ( the minutes talked)
or, T = $10 + m ($0.05)
or T = 10 + 0.05 m (when m < 600)
<u>Case 2:</u><u> when the minutes talked is more than 600 minutes.</u>
Let us assume the minutes talked over 600 = k minutes
Total Charges = Flat Fee + Charges for 600 minutes + 0.15 x ( the minutes talked over 600)
or, T = $10 + 600 ($0.05) + k($0.15)
or T = 10 + $30 + 0.15 k (when k > 600)
⇒ T = 40 + 0.15 k (when k > 600)
Hence, in both the cases, the given total amount is given as:
T = 10 + 0.05 m (when m < 600)
T = T = 40 + 0.15 k (when k > 600)
