Answer:
The road bank angle is 16.38⁰.
Explanation:
radius of curvature of the road, r = 50 m
allowable speed of car on the road, v = 12 m/s
The bank angle is calculated as;

where;
θ is the road bank angle
g is acceleration due to gravity = 9.8 m/s²

Therefore, the road bank angle is 16.38⁰.
D. sample 4 would be your answer
1200 watts / 120 volts =10 amps begins to flow as soon as you plug it in.