Multiply 80 miles by 4 hours to get 320 miles for 4 hours.
The answer for this question is 140 degrees
Y=v(initial)*t+1/2at^2
since the velocity is zero at the maximum height then we get
y=1/2at^2
a is just acceleration due to gravity so a=g which is 9.8 m/s^2.
so y=1/2gt^2.
Answer: .....
Step-by-step explanation: