To find out how many rolls Rosa can make with her 3 3/4 pounds of dough, we first need to convert the mixed number into an improper fraction.
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Convert \( 3 \frac{3}{4} \) to an improper fraction: \[ 3 \frac{3}{4} = \frac{3 \times 4 + 3}{4} = \frac{12 + 3}{4} = \frac{15}{4} \text{ pounds} \]
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Now, Rosa uses \( \frac{1}{8} \) of a pound for each roll. To find out how many rolls can be made, we divide the total amount of dough by the amount used for one roll: \[ \text{Number of rolls} = \frac{15/4}{1/8} \]
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Dividing by a fraction is the same as multiplying by its reciprocal: \[ = \frac{15}{4} \times \frac{8}{1} = \frac{15 \times 8}{4} = \frac{120}{4} = 30 \]
Thus, Rosa can make 30 rolls from her dough.