Answer:

Step-by-step explanation:
Given the formula;

We want to solve the given formula for r.
Multiply both sides by 


Take square root of both sides






Answer: 13.900
Step-by-step explanation:
Answer:
6 hours
Step-by-step explanation:
lmk if you want an explanation
Answer:
Step-by-step explanation:
<u>It is assumed the angles A and C are congruent:</u>
- 3x + 40 = x + 50
- 3x - x = 50 - 40
- 2x = 10
- x = 5
m∠A = 3*5 + 40 = 55°