The problem asks us to calculate the average broadcast time of a single spot advertisement in 1984, given the total monthly broadcast time for spot ads and the number of spot ads broadcast. The total monthly broadcast time is given as 1447.8 minutes, and the number of spot ads is 8686. We are asked to find the average broadcast time per spot ad in seconds.

1. Problem Description

The problem asks us to calculate the average broadcast time of a single spot advertisement in 1984, given the total monthly broadcast time for spot ads and the number of spot ads broadcast. The total monthly broadcast time is given as 1447.8 minutes, and the number of spot ads is

8

6

8

6. We are asked to find the average broadcast time per spot ad in seconds.

2. Solution Steps

First, we need to find the total broadcast time in minutes for the year 1984 from the table. The problem states that the total broadcasting time in 1984 for spot ads is 1447.8 minutes. Also the number of ads is

8

6

8

6. So, the average broadcast time in minutes for a single spot advertisement is:

$Average\ time\ (minutes) = \frac{Total\ time\ (minutes)}{Number\ of\ ads} = \frac{1447.8}{8686}$

$Average\ time\ (minutes) \approx 0.16668\ minutes$

Now we need to convert this to seconds. Since 1 minute = 60 seconds, we multiply by 60:

$Average\ time\ (seconds) = 0.16668 \times 60 \approx 10.0008\ seconds$

3. Final Answer

The average broadcast time per spot advertisement in 1984 is approximately 10 seconds.