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 Dec3 revised Can the volume of a partial sphere be re-written as $V= \frac{4\pi}{3}r^{2}h$? added 85 characters in body Dec3 revised Can the volume of a partial sphere be re-written as $V= \frac{4\pi}{3}r^{2}h$? added 52 characters in body Dec3 answered Can the volume of a partial sphere be re-written as $V= \frac{4\pi}{3}r^{2}h$? Oct5 awarded Yearling Nov17 revised Calculus 3 Explained added 828 characters in body Nov17 answered natural log of pi to sixty digits, a reference needed Nov17 revised Calculus 3 Explained added 121 characters in body Nov17 revised Calculus 3 Explained added 150 characters in body Nov17 answered Calculus 3 Explained Nov17 answered Related Rates Equation Nov17 answered Polar coordinates - issue with direction denoted by angle Nov16 answered Ratio of lengths in isosceles triangle Nov15 revised Find Standard Error and fill in the blanks. added 218 characters in body Nov15 answered Find Standard Error and fill in the blanks. Nov14 comment Playing roulette And for the second part, expected value of bet = wager x prob = $\$16 \times 92.3\% = \$14.77$ ! Nov14 comment Playing roulette Oh yes, I forgot to subtract the initial investment of 100, ie: 94.74 - 100 = - 5.26, where the "expected return" of -(2/38)*100 = -5.26 is a loss of 5.26 Nov14 revised Playing roulette added 2 characters in body Nov14 revised Playing roulette added 73 characters in body Nov14 comment Playing roulette Expected value of a bet = wager x probability. Nov14 revised Playing roulette added 15 characters in body