A football is in the shape of a prolate spheroid, which is simply a solid obtained by rotating an ellipse a x2 a2 + y2 b2 = 1b about its major axis. An inflated NFL football averages 11.125 inches in length and 28.25 inches in center circumference. If the volume of a prolate spheroid is 4 3 pab2 , how much air does the football contain?

Fi YUf.c. 2053 - 00\ 11/2'111"1 A reader wrote to the "Ask Marilyn" column in Parade Magazine, "Say you're in a public library, and a stranger strikes up a conversation with you. She says, 'Let's show quarters to each other, either heads or tails. If we both show heads, I pay you $3. If we both show tails, I pay you $1If they don't match, you pay me $2.' ... As a game is quiet, you can play in the library. But should you" Should you play strategy for you and for the stranger, as well as the value of the game. 3p 2.T ... (, -rL) .~- 2-.P: