Since I am not sure what you want to compare it to, here is the most common conversion. There are 28.35 grams in one ounce. In terms of ounces, 13 grams is equal in weight to .46 onces.
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1 g = 1,000,000 μg 10 g = 10,000,000 μg
700,000 g
w
G = Girl's present age F = Father's present age 4G = F G +7 = 1/2 (F - 12) By substitution: G + 7 = 1/2 (4G - 12); G = 13 By plugging in the value of G = 13; F = 52 The girl is presently 13 and her father is 52.