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- Find a quadratic equation for a function y=f(x) which crosses the x-axis at x=5 and x=6, and which crosses the y-axis at y=-60. What would f(x) equal?What is the equation of g(x) in general form?A company has found that its rate of expenditure (in hundreds of dollars) on a certain type of job is given by E′(x)=4x+5, where x is the number of days since the start of the job. Find the total expenditure if the job take 2 days.