Answer:
D. 23.1%
Step-by-step explanation:
852-692=160 160/692=0.231213873 rounds to 0.231 move decimal over two places to the right to make it percent which is 23.1%
The return trip was 21.2 hours long.
Step-by-step explanation:
Given,
Speed of plane from US = 212 mph
Speed of plane on return trip = 232 mph
Let,
x be the time taken on return trip.
Time taken from US = x+2
We know that;
Distance = Speed * Time
Distance of plane from US = 212(x+2) = 212x+424
Distance on return trip = 232x
As the distance will be same, therefore,

Dividing both sides by 20

The return trip was 21.2 hours long.
Keywords: distance, speed
Learn more about speed at:
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Answer:
Letter B the second one
Step-by-step explanation:
A) x=5+/-73 is the answer I think
Answer:
0.5 liter = 500000 cubic millimeters