What is the length of BC?
(Type your answer in the following format: sqrt(7) or 12sqrt(7) )

Measures of the angle of r, 31 s (x+4) t (3x+9)

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 measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?