In mathopolis, an adult is a person 21 years of age or older and a child is a person under 21 years of age. exactly half of the adults in mathopolis are female, and exactly half of the female adults have exactly one biological child. nobody else has a child, and there are no other children. what percent of the people of mathopolis are children?

  20%

Step-by-step explanation:

If there are 4 adults, 2 are female, and 1 of those has 1 child. Then the population is 4 adults and 1 child. The children make up 1/5 = 20% of the population.

b

step-by-step explanation:

the word superfluous means unnecessary

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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