An amusement park ride allows a maximum of 15 riders at any one time. There are 4 riders already on the ride. The inequality, r+4≤15, can be used to find r, the number of additional riders allowed on the ride. Which inequality represents all possible values of r? r≤19 r≥19 r≤11 r≥11

Quadrilateral abcd in the figure below represents a scaled-down model of a walkway around a historic site. quadrilateral efgh represents the actual walkway. abcd is similar to efgh. what is the total length, in feet of the actual walkway?

The area of square garden is 300m squared. how long is the diagonal?

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