Sal has already finished StartFraction 5 Over 9 EndFraction 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 StartFraction 5 Over 9 EndFraction times three-fifths 45 times StartFraction 5 Over 9 EndFraction divided by three-fifths 45 times StartFraction 4 Over 9 EndFraction times three-fifths 45 times StartFraction 4 Over 9 EndFraction divided by three-fifths