Jason has four lengths of rope. the lengths are 3 inches, 15 centimeters, 0.3 meters, and 0.5 feet. about how much rope does jason have? [1 inch ≈ 2.5 cm]

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

Hi, can anyone show me how to do this problem? 100 points for this. in advance

Aregular pentagon with a perimeter of 21 inches is dilated by a scale factor of 5/3 to create a new pentagon. what is the perimeter of the new pentagon?