The original cost of skateboard cost $68. the skateboard sold at a cost of $51 during clearance sale. what was the percent of decrease in the cost of the skateboard?

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?

15/16 as a decimal rounded to the nearest hundredth

Lena reflected this figure across the x-axis. she writes the vertices of the image as a'(−2, 8), b'(−5, 6), c'(−8, 8), d'(−4, 2).