Answer:
4
Step-by-step explanation:
side ('s') squared equals 160
s² = 160
so 's' = which can be broken down to · · which equals
2 · 2 · or 4
Answer:
x = 0
Step-by-step explanation:
Let's simplify first:
x² + x² + x² = x² + x² =>
3x² = 2x² =>
3x² - 2x² = 0 =>
x² = 0
x = √0 = 0
Answer:
2.6 hours.
Step-by-step explanation:
That would be 1.8 hours plus 4 * 12 = 48 minutes.
48 minutes = 48/60 = 0.8 hours.
Total is 1.8 + 0.8 = 2.6 hours.
Answer:
5 hours 12 seconds
Step-by-step explanation:
For the entire train to pass the person, the head of the lead wagon must travel (9·16 m) in 12 seconds. It is traveling at a speed of ...
(9·16 m)/(12 s) = (144/12) m/s = 12 m/s
For the train to travel 216 km + 144 m = 216,144 m will take ...
(216,144 m)/(12 m/s) = 18,012 s = 5 hours 12 seconds
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<em>Comment on the speed</em>
The speed of this "wagon train" is about 26.8 miles per hour, faster than any human and most animals can run for long periods. The Pony Express cross-country mail delivery service maybe set a reasonable standard for cross-country travel. Its average speed was about 10 miles per hour.