Aplane travels at a constant speed it takes 6 hours to travel 3360

a. miles what is the plane speed in miles per hour

b. at this rate how many miles can you travel in 10 hours

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