Sin(theta) = 3/5 , (theta) in Quadrant 2

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The weights of broilers (commercially raised chickens) are approximately normally distributed with mean 1387 grams and standard deviation 161 grams. what is the probability that a randomly selected broiler weighs more than 1,425 grams?

Find the volume of the solid bounded by the plane z=0 and the paraboloid z=1-x^2 –y^2