Question

Help please!

Answer 1

A) 56 degrees B) 34 degrees C) 13 feet

Answer 2

See this figure. http://puu.sh/szNCt.png
a) $cos B = \frac{20}{24}$x
enter in calculator invcos or cos^-1 of 4/5 and you should get B ≈ 37 degrees (make sure your calculator is in degrees and not radians)
b) Since this is a right triangle, 
C ≈ 53 degreesc) By the Pythagorean Theorum, AC is approximately 13.27.
$AC^2 + 20^2 = 24^2$
AC ≈ 13
Hope this helps! =)