Which equations could be used to solve the problem?
a balloon, with a final volume of 40 cm3, took 4 min to fill. at what rate was the balloon filled?
choose exactly two answers that are correct.
a.40 cm3 • r = 4 min
b. r – 4 h = 14 in.
c.40 cm3 = 4 min • r
d. 40*cm3/4 min=r

Grace is standing 18 feet from a lighthouse and kelly is standing 10 feet from grace. the angle that grace looks up to see the top of the lighthouse is 45°. the angle that kelly looks up to see the top of the lighthouse is y°. find the height, h, of the lighthouse. find the angle, rounded to the nearest tenth of a degree, in which kelly looks up to the top of the lighthouse. to the nearest tenth of a degree, find the value of x° . in two or more sentences, explain your calculations