Many yellow school buses have while roofs. 1 low much difference docs this make? How much fuel would a while rool save, if you arc driving an air conditioned bus in the summer?

A March 2013 (USA Today article reported that “More than a dozen limes a day, doctors sew up patients with sponges and other supplies mistakenly left inside.” What is the probability that this will happen during a randomly selected surgical operation?

Look lor the answers online at tPt.aapt.org. Question suggestions are always welcome! For more Fermi questions and answers, see the now available Guesstimation 2.0: Solving Today's Problems on the Back old Napkin, by Lawrence Weinstein (Princeton University Press, 2012).

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