In a plan for area codes, the first digit could be any number from 4 through 9, the second digit was either 0 or 4, and the third digit could be any number except 0. With this plan, how many different area codes were possible?

The product of two negative rational numbers is always zero sometimes zero never zero

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

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?