Hans Full is pulling on a rope to drag his backpack to school across the ice. He pulls upwards and rightwards with a force of 112.8 Newtons at an angle of 30˚ above the horizontal to drag his backpack a horizontal distance of 78.1 meters to the right. Determine the work (in Joules) done upon the backpack. (round to the nearest tenth)

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?