the price of a stock decreased by 60 cents one week, decreased 10 cents the next week, and decreased another…

the price of a stock decreased by 60 cents one week, decreased 10 cents the next week, and decreased another 20 cents the following week. what is the average change in the price of the stock over the three weeks?\n-270 cents per week\n-90 cents per week\n-87 cents per week\n-30 cents per week

the price of a stock decreased by 60 cents one week, decreased 10 cents the next week, and decreased another 20 cents the following week. what is the average change in the price of the stock over the three weeks?\n-270 cents per week\n-90 cents per week\n-87 cents per week\n-30 cents per week

Answer

Explanation:

Step1: Calculate total decrease

The stock decreased by 60 cents, then 10 cents, and then 20 cents. So the total decrease is $60 + 10+20=90$ cents.

Step2: Calculate average decrease

We want to find the average change over 3 weeks. The average change is the total decrease divided by the number of weeks. So it is $\frac{90}{3}=30$ cents per week. Since it is a decrease, the average change is - 30 cents per week.

Answer:

-30 cents per week