- When going from a 5 to a 6 on the Richter scale, what is the increase in energy release?

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Profit is given by the quadratic function P(q). Profit is $0 at q=13 and q=33. Maximal profit is $500. Find an expression for P(q)? Where can I find average monthly daylight for US cities preferably in minutes/hours? Consider the polynomial x^5-4x^2-7x-2=0. Show that the closed circle centered at x=0 of radius two contains at least two roots.? 7x-9=6x+3y? What is the formula weight of acetic acid, CH3COOH, which is found in vinegar?