Martin made an error while finding the volume of a cone with diameter 9 centimeters and height 9 centimeters. Explain his error, including how to correct it.

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

Polygon hh is a scaled copy of polygon gg using a scale factor of 1/4. polygon h's area is what fraction of polygon g's area?

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.