Subject: Math Differential Equations

Instructions: Read carefully the problem and answer it asap, need solution. thank you for your help :>

10 10 points Compute the area of the surface generated by revolving the arc x2 = 16 - 8y in the first quadrant about the y-axis. Final answer in 4 decimal places. Type your answer.. Next Previous11 10 points The cost of fuel per hour for running a ship is proportional to the square of the speed and is Php1,295 per hour when the speed is 10 miles per hour. Other costs amount to Php6,480 per hour regardless of the speed. Find the speed (in mph) that will make the cost per mile minimum. Final answer in 4 decimal places. Type your answer... Next Previous12 10 points Starting from a certain point "A", a man walks eastward at the rate of 2.8kph. 16 minutes later, a second man starting from "B" situated E 6km south and 25km east of "A" walks westward at the rate of 3.7kph. Determine the rate (in kph) the two men are approaching one another 2.1 hours after the second man has left point "B" westward bound. Final answer in absolute value and 4 decimal places. 1 Type your answer. 2 Next Previous 3 4