Elham, Nicole, and Kaymon are making paper from a combination of wood pulp, and cotton using a constant ratio. Elham uses 5g. of wood pulp and 2g. of cotton. If Kaymon uses 20g of wood pulp, How much cotton should he use?

An isosceles trapezoid with a perimeter of 42 inches. each of the congruent non parallel sides is 5 inches long, and the trapezoid is 3 inches tall. how long are the two parallel sides? a. 10 in, 22 in b. 16 in, 16 in c. 10 in, 16 in d. 12 in, 20 in