The 2008 winner of the Tour de France was Carlos Sastre. He biked the 2212-mile race in 87 hours, 52 minutes, and 52 seconds.
what was sastre average speed in miles per hour? explain

Grandpa ernie is shrinking! over the past 4 years his height decreased by a total of 2.4 cm.it decreased by the same amount each year. what was the change in grandpa ernie's height each year