HELP WITH 3 and 4 pls ASAP will mark brainlist

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?

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?

Which expression is the factorization of x^2+10+21