Answer:
the average speed of the car is 170 mph.
Explanation:
Given;
initial speed, u = 70 mph
time of motion, t₁ = 3 hours
final speed, v = 20 mph
time of motion, t₂ = 2 hours
The average speed of the car is calculated as;

Therefore, the average speed of the car is 170 mph.
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C is incorrect because the atomic number and symbol are the only ones displayed.
I think it could be A but it is most likely C
Hope it helps!!
Carbon, hydrogen, nitrogen and oxygen are all non metals.
The car would take 20 seconds to go 1000 meters. This can be found by dividing 1000 by 50.
If you need more help, comment below and I will be happy to assist.