- Could a crystal be made into a light bulb?

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For the following function use the quadratic formula to find the zeros of f. Then find the max or mini value of f(x). a. f(x) = x^2 - 4x? The random variable X is uniformly distributed qith E(X)=5 and V(X)=3. Find P(|x-4|<1.5)? A sector of a circle has a perimeter of 12 cm and an area of 8cm^2. Find all possible radii.? Are first cousins distant relatives as in blood relation and sharing genes? How do I find an expression for the function whose graph is the bottom half of the parabola x+(y-1)^2=0?