We are given

we know that

so, we get
opposite =7
adjacent=24
now, we can find hypotenuse


now, we can draw triangle and then switch vertices accordingly
we can find cos(B) using second triangle

In second triangle:
adjacent=7
hypotenuse =25
so, we get
................Answer
6 to the fourth power is 1296 because 6x6x6x6 gives you 1296
941 with a remainder of 5
C - divide 20 by 2 1/2 and you’ll get eight
I hope this is the correct answer.