There are 12 female students and 18 male students in a class. which of the following expresses the ratio of female students to male students in simplest form?

What's the difference between: x≥0 and nonnegative integer. ?

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches.approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *

*segment an is an altitude of right ? abc with a right angle at a. if ab = 2root 5 in and nc = 1 in, find bn, an, ac.