Challenger elementary school has 800 students. every wednesday, 12 percent of the students stay after school for chess club.

The scatter plot shows the number of animal cells clara examined in a laboratory in different months: plot ordered pairs 1, 20 and 2, 60 and 3,100 and 4, 140 and 5, 180 what is the approximate predicted number of animal cells clara examined in the 9th month?

Geometry - finding area of regular polygons and sectors (check my math, i can’t find the error)

Sylvia rented a boat for $16.50 per hour. her total rental fee was $49.50. for how many hours did sylvia rent the boat