Joshua used two wood beams, pc and qa, to support the roof of a model house. the beams intersect each other to form two similar triangles qrp and arc. the length of segment pr is 3.4 inches, and the length of segment cr is 5.1 inches. the distance between a and c is 4.2 inches.
what is the distance between the endpoints of the beams p and q?
2.02 inches
2.8 inches
2.5 inches
3.4 inches

Astudent received the following grades last semester. find the student's semester grade point average. an a is algebra (3 credits), a b in history ( 3 credits), a in sociology ( 3 credits) a d in english ( 3credits) and a c in seminar ( 2credits). an a is worth 4 points, a b is worth 3 points a c is worth 2 points and a d is worth 1 point.

What is the value for this expression? 2e-5

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