How many hours from 830am to 1700pm?

How do you write six and five hundreths in numbers? Can you give me examples of parallelogram and polygon method of representing vectors? What set of numbers does -625 belong to? Name two biofertilizers and two biopesticides? How do you find the radius if given the diameter? How many pennyweights are in one ounce? Which element has mass of 2.65 x 10 to the power of minus 23? How many significant figures are in measurement 0.0034kg? How do you change the combination on a master lock and the product number is 2811M? How many ten pence pieces are in two pound and forty pence? How many tenths are there on 7.3? How many times can 1 can go into 45? What is the difference between 3.96 and 4.18? How would you you write 264 as a roman numeral? What is 27 divided by 28.35? What is the ratio of 4 feet to 3 yards in simplest form? Can you find out how old a cuckoo clock is by the maker of the clock? Difference between their and there? What is the area if the radius is 15 com and you are using 3.14 for pi? What is 2.7 x 2.0 x 2.1 cm in inches?