A thunderstorm began at 4pm on a certain day. During the 1.5 hour period following the start of the storm, the temperature was changing at a rate of t(x)=9.48x - 15.49x +17.38x-9.87 F per hour where x is the number of hours since the storm began, 0x 1.5. Check: t(2)-38.77 The graph of t(x) is shown here. Use this information to answer the next 3 questions. 15 1(x) degrees F per hour 10 4 -10- hours after 4 pm 1.25 Calculate the total AREA of the shaded regions on the graph of t(x). Round your answer to 3 decimal places. Find the change in the temperature during the 1.5-hour period after the storm began. Round to 3 decimal places. F