Which of these phrases is correct? A 9 is a multiple of 3 and a factor of 12. B 9 is a factor of 45 and a multiple of 5. C 9 is a multiple of 6 and a factor of 72. D 9 is a factor of 54 and a multiple of 3.
A trucker on the interstate travels 32 miles in 30 minutes. At this rate, how far will the truck travel in 4.5 hours?
a roof rises 1.2 feet vertically and 5.9 feet horizontally. What is the grade of the roof?