Convert the decimal expansion 0.31717 to a fraction. a) 133/455 b) 157/495 c) 52/165 d) 99/166

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

If rt is greater than ba, which statement must be true ?

Find two numbers if their sum is 91 and the ratio is 6: 7?