About 8.73 x 108 people in the world speak Chinese. About 3.22 x 107 speak Spanish. In scientific notation, how many more people speak Chinese than Spanish? (what is the difference between the number of people who speak Chinese and the number of people who speak Spanish?)

Will used 20 colored tiles to make a design in art class. 5/20 of his tiles were red. what is an equivalent fraction for the red tiles?

Fiona races bmx around a circular dirt course. if the radius of the course is 70 meters, what is the total distance fiona covers in two laps of the race? a. about 30,772 meters b. about 15,386 meters c. about 879.2 meters d. about 439.6 meters e. about 219.8 meters23 points hurry

You paint a 1/2 of a wall in 1/4 hour. how long will it take you to paint one wall