How many 9s are in 630?

What is number of formula units? How do you find one fifth of 28? What is power set of power set of an empty set? When you multiply a negative to a positive what is the answer? How is the quince robot taught to do its tasks? Why can shell eggs be received at an air temperature of 45 degrees Fahrenheit or lower instead of an internal temperature of 41 degrees Fahrenheit or lower? What does from mean in math? What is the value of 3 squared plus 4 x 6-2? What number is divisible by 2 3 5 6 and 10 but not 9? What are the straps that support the seat cushion of an armchair called and where can I find them on-line? What is the HUAC and what did it set out to do in the 1940s and 1950s? What is bullion algebra? When liquid is at 0 degrees c does it freeze? What is 3x 8y plus 7x plus 3z? How many square feet in a 10X 12 room? What does the volume of water mean? What englishman introduced the pi symbol and in what year? What are decimals equivalent to 5.300? Can you give exputex and calpol together? What ius the value of the 4 in the 546210 give the answers in words?