3) A rollercoaster climbs straight up to its peak at 50 meters above ground. Then, it drops 65 meters into an underground tunnel. What is the elevation when the rollercoaster drops underground? *

Equation for the calculation double 2 and then add 5

Find the unit rate for: 75% high-fiber chimp food to 25% high -protein chimp food.

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.