Question

In a local election, a group hired a public relations firm to promote its candidate in three ways: telephone calls, house calls, and letters. The cost per contact is given in matrix m, and the number of contacts of each type made in two adjacent cities is given in matrix n. Complete the following parts:

1) Calculate the total cost of telephone calls in city A
2) Calculate the total cost of house calls in city B
3) Calculate the total cost of letters in city A
4) Calculate the total cost of telephone calls in city B

Answer 1

To calculate the total cost of different types of contacts in different cities, we can multiply the cost per contact by the number of contacts.

Step-by-step explanation:

To calculate the total cost of telephone calls in city A, we need to multiply the cost per contact for telephone calls by the number of contacts made in city A for telephone calls. Let's denote matrix m as the cost per contact and matrix n as the number of contacts. To calculate the total cost of telephone calls in city A, we can use the formula:

Total cost of telephone calls in city A = m[1][1] imes n[1][1]

We can follow a similar approach to calculate the total cost of house calls in city B, the total cost of letters in city A, and the total cost of telephone calls in city B by using the corresponding values from the matrices m and n.

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