brainest if right plus 50 points and 20 extra points if you get brainiest! please do part A and part B for problem 1 and also please do problem 2 if i don't get A or B on this i fail this class so please help 30 pts and brainiest

Find the sum of the following series. round to the nearest hundredth if necessary.

Atriangular field has sides of lengths 21, 39, and 41 yd. find the largest angle. (round your answer to the nearest degree.)

The map shows the location of the airport and a warehouse in a city. though not displayed on the map, there is also a factory 112 miles due north of the warehouse. a truck traveled from the warehouse to the airport and then to the factory. what is the total number of miles the truck traveled?