How many hours is 7.30am to 9pm?

What is critical marangoni number? Why can't we add or subtract vectors like scalars? What are the common multiples of 4 and 8? Which is the Standard for inspection of concrete bucket? How many microns in a mil? 1 4 9 16 25 then what is the next number? If music CD is 2.5 inches in radius what is circumference? If on a map 0.5 inches equals 100 miles and the state of Wisconsin is about 1.5 inches long how many miles long is Wisconsin? What is a factor pair for 18? How many number of angles for an tetrahedron? What does ii ix vi and iv mean? Total number of psalms in the bible? What are the steps to the elimination method? How old are three tenors? What is 3.13 rounded to the nearest hundred? How much money is a dime? What number can multiply by 970? If a storm window has an area of 400 square inches what are the dimensions if the window is 12 inches higher than it is wide? How many ounces in a round container that is 3 inches in circumference x 5 inches high? What is one-third of 23?