In this figure, Q, R, and S lie on a line, as do P, R, and T. Find the measure of ∠PRS.

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

Using the side-splitter theorem, daniel wrote a proportion for the segment formed by luke segment de. what is ec?

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