Answer:
57.5 degrees
Step-by-step explanation:
Assuming this is a triangle
a is adjacent is ∠B
b is opposite of ∠B
Use the inverse tangent equation: 
This equals to 57.52880771
Answer:
$40
Step-by-step explanation:
Divide.
$800 / 20 hrs.
= $40
3.174 is closer to 3.2 because, when rounding, 0.07 rounds up to 0.2.