Maddie is finally able to upgrade her cell phone. the one she wants costs $250 but she is able to get it for 60% off. how much does she pay for her phone?

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