Question

Sal has already finished 5/9 of the 45 math problems he was assigned. If each math problem took him Three-fifths of a minute to finish and this pace continues, which expression can be used to determine the amount of time it will take him to finish his remaining homework?

45 times 5/9 times three-fifths
45 times 5/9 divided by three-fifths
45 times 4/9 times three-fifths
45 times 4/9 divided by three-fifths

Answer 1

45 times 4/9 times three-fifths (c)

Explanation

Hope this helped! :)

Answer 2

45 times 4/9 times three-fifths

Explanation:

4/9 of the 45 questions are done at a rate of 3/5 of a minute. If he finished 5/9 of the 45 then he has 4/9 of the 45 left and the 3/5 of a minute would be continued in the 4/9 of the 45.