At 11 o clock, Micha’s mother sends him to the corner store for milk and tells him to be back in 30 minutes. Examine the graph. Calculate the rate of change of each of the line segments

Rate of change: AB
Rate of change:BC
Rate of change:DE
Rate of change: EF
Rate of change: FG

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?