Question

The cost of making a telephone call is a fixed 30 cents for each plus 12 cents for each minute. Agnes made a call that lasted 8 minutes to Bianca. Twenty minutes later, Agnes made a call that lasted for 15 minutes to Carol. What is the total cost for the two calls that Agnes made? Give your first in cents than in N$?.)

Answer 1

To find the total cost of the two calls made by Agnes, we will calculate the cost of each call separately and then sum them up.

1. Cost of the call to Bianca (8 minutes):

   • Fixed cost = 30 cents
   • Cost per minute = 12 cents
   • Duration = 8 minutes

   Cost for the call to Bianca: \[ \text{Total cost} = \text{Fixed cost} + (\text{Cost per minute} \times \text{Duration}) \] \[ \text{Total cost} = 30 + (12 \times 8) = 30 + 96 = 126 \text{ cents} \]

2. Cost of the call to Carol (15 minutes):

   • Fixed cost = 30 cents
   • Cost per minute = 12 cents
   • Duration = 15 minutes

   Cost for the call to Carol: \[ \text{Total cost} = \text{Fixed cost} + (\text{Cost per minute} \times \text{Duration}) \] \[ \text{Total cost} = 30 + (12 \times 15) = 30 + 180 = 210 \text{ cents} \]

3. Total cost for both calls: \[ \text{Total cost for both calls} = \text{Cost to Bianca} + \text{Cost to Carol} \] \[ \text{Total cost} = 126 + 210 = 336 \text{ cents} \]

Now, to convert this total cost into Namibian Dollars (N$): Assuming the conversion rate is 1 USD = 100 cents (the same would generally apply for N$ unless specified otherwise):

\[ \text{Total cost in N$} = \frac{336 \text{ cents}}{100} = 3.36 \text{ N$} \]

Thus, the total cost for the two calls that Agnes made is 336 cents and 3.36 N$.