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Sagot :
change the mixed numbers into improper fractions so 3 1/4 becomes 8/4 and 2 1/2 becomes 5/2 then change 5/2 into 10/4 so you can subtract the fractions so [tex] \frac{13}{4} - \frac{10}{4} [/tex] your answer is 3/4 hours or B.
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