180k views
0 votes
The price f(x), in dollars, of fuel A after x months is represented by the function below:

f(x) = 2.15(0.98)x

Is the price of fuel A increasing or decreasing and by what percentage per month? Justify your answer.

1 Answer

4 votes

Answer:

The price of fuel A decreases by 2 % each month.

Explanation:

We are given a function for the price of fuel which depends on the number of months.

f(x) = 2.15
* (0.98)^(x)

In the month 0, the price of the fuel is 2.15 and by the next month the price is 0.98 times the price of previous month.Hence the price of the fuel A decreases.

The initial price = 2.15

In the next month it reduces to 2.15
* 0.98 = 2.10

This means that the price becomes 0.98 times of the previous month and hence each month the price decreases by 2%.

User Paul Adamson
by
7.6k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories