What are observational records that contain significant detailed information in the form of?

What do you times by 3 to get 512? A vertical tank is 50 ft tall with a diameter of 7ft product level is 15ft what is the volume of product in the tank? Why is there a need to use a straightedge and compass to construct geometric figures? What is the probability that a random selected number from 20 to 30 is divisible by 3 and then divisible by 12 after replacing first? What is 1000000-60000000000000? What is after the lower case roman numerals in an outline? What is the maximum number of pupils per classroom as per Department of Education Order? How spell the number 35? How many significant figures does 83.400 have? What is one eighth plus a half? How do you make a factor tree for 25? What is 68 over 17 reduced to? Which quadrant would these coordinates be located (3-2)? How do you say 652190 in word form? What is 220 over 990 simplified? How do you find greatest possible error for measurement of 3ft? How many cm is 14 inches? How do you determine if the quantities in a pair of ratios are equivalent? 240 feet equals how many yards? How do you find the hypotenuse of triangle?