Answer:
1. 98.7 km
2. 303.5 degree
Step-by-step explanation:
Using the alternate angle, the angle at B will be 50 + 10 = 60 degree.
To calculate the length AC of the returning journey, use cosine formula to calculate it.
To find the bearing of the returning journey, use sine rule to calculate it.
Please find the attached file for the solution
In quadrant IV, is positive. So
Then by the definition of tangent,
y = 3x+7
Slope intercept form is
y = mx+b where m is the slope and b is the y intercept