Select the choice that represents a quadratic functiona) y=3x+1b) y^2= x^2-5c) y= 2x^2d) y= x^3 + 4x^2-4

The weekly amount spent by a company for travel has an approximately normal distribution with mean = $550 and standard deviation = $40. a) what is the probability that the actual weekly expense will exceed $570 for more than 20 weeks during the next year? (note: one year = 52 weeks) b) what is the probability that actual weekly expenses exceed $580 for 10 or more, but 16 or fewer weeks during the next year?