9514 1404 393
Answer:
133 1/3 km/hour
Step-by-step explanation:
Average speed is computed as ...
average speed = (total distance)/(total time)
= (80 km +120 km +200 km)/(2/3 + 1 + 1 1/3 hour) = 400 km/(3 hour)
= 133 1/3 km/hour
1cc means one cubic centimeter. I advise you to look at the letter units
The answer is D
here's your answer
<span>By the Pythagorean theorem
AB = </span>√(12²+5²) = √169 = 13 units
5/4 is the constant of proportionality
