64 hours per hour average
350 miles ÷5.25 hours in which it took= 63.63 rounded is 64 mph average
The Potential Energy, is given by:

where:
m = mass of the object (in Kg)
g = gravity
h = height (in m)
Hence:

ANSWER
B. 19,600 J
Answer:
x = 115
z = 27
Step-by-step explanation:
x + 65 = 180 (same side interior angles)
x = 115
x = 3z +34 (alternate interior angles)
115 = 3z + 34
3z = 81
z = 27