Question

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 ?
O A. 20 hours
O B. 3 hours
O C. 1 hour
O D. 30 hours

Answer 1

B.3hours

Explanation:

12-9=3

so the letter T is=3

Answer 2

B: 3 hours

Explanation:

Since we know that it takes 12 hours to clean the windows and the cleaners were only able to clan for 9 hours, we just subtract 9 from 12 which gives us the answer:3Hours.