- Help with a Physics/Math Question. (Grade 10)?

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Find a basis of the subspace of R4 that consists of all vectors perpendicular to both [1,0,0,7] and [0,1,-9,5]. Please show work!? Iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii? Find the quadratic function f(x)=ax^2+bx+c that goes through (3, 0) and has a local maximum at (0, 1) [Calculus]? Average weight is 182.9 pounds and standard deviation is 40.8 pounds, what is the probability a person will be less than 174 pounds? Can anybody tell me what's the Chaos Theory math equation?