November 3, 2021
November 3, 2021

# MM212 College Algebra Unit 8 Discussion

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### MM212 College Algebra Unit 8 Discussion

In Unit 8 you will learn about variation. You might not realize it, but variation is a part of everyday life. For example, the faster you drive on a highway, the less time it takes to reach your destination. The more you exercise the more calories you burn. On the Discussion Board you will work with a joint variation problem involving the population of two cities, their distance from each other, and the number of daily phone calls between them as described by the variation equation below.

There are three parts to the Unit 8 Discussion activity. Be sure to complete all three components to earn the most points! Click on the Discussion link located below the unit button to the left for full details and instructions.

#### Part 1:

The average number of daily phone calls, C, between two cities varies jointly as the product of their populations, P1 and P2 , and inversely as the square of the distance, d, between them.

1. Calculate the distance in miles between your current city and the capital city of your state. (If you live in the capital of your state, choose a different city in your state to complete the problem.) Use any mapping application (i.e., Google® Maps) to determine this distance.

2. Use a search engine to determine the approximate populations of the two cities.

3. Determine the average number of phone calls between the two cities using the formula above. Show all calculations.