Question

Determine whether the following claim could be true. Explain your answer.
By turning off her lights and closing her windows at night, Maria saved 110% on her monthly energy bill.
Choose the correct answer below.
A. The claim could be true because her new monthly energy bill would be 90% of the previous monthly energy bill, which makes sense.
B. The claim could not be true because her new monthly energy bill would be - 10% de the previous monthly energy bill. This is impossible since the bill cannot be negative.
C. The claim could be true because her new monthly energy bill would be 10% of the previous monthly energy bill which makes sense.
D. The claim could not be true because her new monthly energy bill would be - 90% of the previous monthly energy bill. This is impossible since the bill cannot be negative

Answer 1

Using proportions, it is found that the correct statement is:

B. The claim could not be true because her new monthly energy bill would be - 10% de the previous monthly energy bill. This is impossible since the bill cannot be negative.

What is a proportion?

• A proportion is a fraction of total amount.

• It assumes values between 0 and 1, that is, between 0% and 100%.

In this problem, first we suppose that she had saved 90% on her monthly energy bill, so compared to the previous month, the amount paid would be of:

100 - 90 = 10%.

Considering savings of 110%, the amount paid would be of:

100 - 110 = -10%.

This would result in a negative bill, which does not exist, hence option B is correct.

You can learn more about proportions at https://brainly.com/question/24372153