A baby weighed 3.2 kg at birth. She gained 0.17 kg per week. She now weighs 5.75 kg. How old is she now?

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Mathematics

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A baby weighed 3.2 kg at birth. She gained 0.17 kg per week. She now weighs 5.75 kg. How old is she now?

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5.75 (weight now) - 3.2 (weight at birth) = 2.55 (how much weight she has gained)

2.55 (how much weight she has gained) / 0.17 (weight gained per week) = 15 weeks

The baby is 15 weeks old.

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