The amount of stretch of a hanging spring versus the mass attached to the bottom of the spring was measured for different masses. The results are shown mass (grams) 2 4 8 10
stretch (centimeters) 4 8 16 20
What is the constant of proportionality between the mass and the amount of stretch?
0.5 centimeters per gram
O 0.5 grams per centimeter squared
2.0 centimeters per gram
2.0 grams per centimeter squared

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