Convert x^2 + y^2 - y = 0 to a polar equation. r^2 = sinθ
r = cosθ
r^2 = cosθ
r = sinθ

Which expression will have the same sum as 3_8 + 1/4?

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%

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