It takes 12 hours to clean the windows of a certain office building. During the first day of cleaning, the workers were able to clean for 9 hours. If the variable t stands for the amount of time the workers have left to clean the windows, which of the following choices is the most reasonable value for t?

A.

3 hours

B.

1 hour

C.

30 hours

D.

20 hours

Question

Mathematics

Tori Gregory

5 May, 18:05

It takes 12 hours to clean the windows of a certain office building. During the first day of cleaning, the workers were able to clean for 9 hours. If the variable t stands for the amount of time the workers have left to clean the windows, which of the following choices is the most reasonable value for t?

A.

3 hours

B.

1 hour

C.

30 hours

D.

20 hours

+3

Answers (2)

Know the Answer?

Mathis · Answer 1

The most reasonable value for t would be A. 3 hours.

Since it would take 12 hours to clean the place and the workers already cleaned for 9 hours, there is still 3 hours left to completely clean the office building. (12 - 9 = 3)

Anastasia · Answer 2

If you would like to know which of the following choices is the most reasonable value for t, you can calculate this using the following step:

t ... the amount of time the workers have left to clean the windows

t = 12 hours - 9 hours = 12 - 9 = 3 hours

The correct result would be A. 3 hours.