Step-by-step explanation:

Hence, coordinates A(2, 1), B(7, 1), C(2, 4) form a triangle.
Answer:
54.3m
Step-by-step explanation:
h = distance above sea level
d = distance he can sea above sea level
d = 3.57h
h = 15.21m
d = ?
d = 3.57 × 15.21
d = 54.2997m approximately 54.3m
The person can see up to a distance of 54.3m
Answer:
inverse -1
Step-by-step explanation:
Explanation is in the file
tinyurl.com/wtjfavyw