8. A projectile launched horizontally with a speed of 10.0 m/s hits the ground in 1.2 seconds. If the projectile had been launched at 20 m/s in the same direction, it would have hit the ground in
a. 0.6 seconds
b. 1.2 seconds
c. (2.4 seconds
d. 4.8 seconds

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees. 

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000