Please help with this math question

15 point ! ~ see if you know the answer to both you!

Apiling for a high-rise building is pushed by two bulldozers at exactly the same time. one bulldozer exerts a force of 1250 pounds in a westerly direction. the other bulldozer pushes the piling with a force of 2650 pounds in a northerly direction. what is the direction of the resulting force upon the piling, to the nearest degree? a. 65 n of w b. 25 n of w c. 45 n of w d. 35 n of w

Using only the digits 5, 6, 7, 8, how many different three digit numbers can be formed if no digit is repeated in a number?