What would be the steps to solving this? kinda confused here.

Which math sentence can be used to determine if the triangle is a right triangle?

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed

The only way to identify an intercept is as an ordered pair. true false