Martin is building a model of a bridge. He uses a straw 5 inches long, attaching it at a right angle to another straw 12 inches long, and then attaches a third, longer straw to
the ends of the first two, completing a triangle.
Then, Martin uses a protractor to measure the angles in the triangle.
Which set of angle measures best describe the triangle in Martin's model?

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of

Benjamin is making bow ties. how many 1/2yards lomg bow ties can he make if he has 18 feet of fabric?