How many times greater is 1 kilogram than 1 microgram?
a. 9
10
b. -9
10
c.1/ 9
10
d. 8
10

An advertising firm has an old computer that can prepare a whole mailing in 6 hours. with the of newer model the job is complete in 2 hours. how long would it take the newer model to do the job alone?

Lines a and b are parallel. what is the value of x? -5 -10 -35 -55

At oaknoll school, 90 out of 270 students on computers. what percent of students at oak knoll school do not own computers? round the nearest tenth of a percent.