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at 1:50 how did u get 20pi over 9?
CentralJerk 6 months ago
@CentralJerk I reduced the fraction 400/180. Both top and bottom have a common factor of 20 so you can divide it out 400/20 = 20 and 180/20 = 9, thus 20/9. Then you just tack on the pi like you had it before. If you don't see the 20 right away you can take smaller factors out until it's fully reduced.
davidtutorsmath 6 months ago
@aschultz15 Great! Thanks.
davidtutorsmath 9 months ago