During a weekend sale, a store sold 85 dvd's for $19 each. what is the total amount of money, rounded to the nearest hundred, the store make by selling dvd's?

What kinds of numbers make up the set of numbers called the real numbers? give examples when you explain a number type. there are a limited set of types of numbers, but an unlimited number of examples of these numbers.

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

Is the point (0, 8) on the x-axis or y-axis? how do you know?