Approximately how many meters are in 100 yards?

A)33
B)45
C)61
D)91

How do you solve a question like this?

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?

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12