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http://prntscr.com/8xzwq7? Ustomer account "numbers" for a certain company consist of 4 letters followed by 3 numbers.? Find the quadratic function f(x)=ax^2+bx+c that goes through (3, 0) and has a local maximum at (0, 1) [Calculus]? 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!? Calculate the exact area bounded by the x-axis and the graph of y=28−11x+x2.?