Graphing linear equations

What percent of 18 is 24? and plz explain thx.

Write an inequality for this description. - one fourth of the opposite of the difference of five and a number is less than twenty.

Michele wanted to measure the height of her school’s flagpole. she placed a mirror on the ground 48 feet from a flagpole, then walked backwards until she was able to see the top of the pole in the mirror. her eyes were 5 feet above the ground and she was 12 feet from the mirror. using similar triangles, find the height of the flagpole to the nearest hundredth of a foot.