Answer:

Step-by-step explanation:
Subtract the 4 from 9
Answer:
Check pdf
Step-by-step explanation:
Ángulo agudo es aquel que mide menos de 90º
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:
B ($9.78)
Step-by-step explanation: