21. A 42 ft ladder leans against a wall. The bottom of the ladder is 16 ft
from the wall. What angle does the ladder make with the ground?

67.61 degrees

Step-by-step explanation:

The question wants us to solve for x. Remember our trigonometric identities.

SOHCAHTOA: We have the Adjacent side and the Hypotenuse, so we must use CAH = cosine.

  a/h = cosx

  16/42 = cosx

  .381 = cosx

Take inverse cosine of both sides.

  cos⁻¹(.381) = x

  x = 67.61 degrees

hi,

6x times 4 is 24x and 5 times 4 is 20, so the answer is 24x+20.

hope this and for a little humor i am groot.

the answer will be