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Soloha48 [4]
3 years ago
14

What is 4.6 × 108 cm/min in meters per hour?   A. 2.76 × 10^8  m/h   B. 2.76 × 10^10  m/h   C. 7.67 × 10^6  m/h   D. 7.67 × 10^8

 m/h
Mathematics
1 answer:
siniylev [52]3 years ago
7 0
1m=100cm\to1cm=0.01m\\1h=60min\to1min=\frac{1}{60}h\\========================\\\\4.6\times10^8\ cm/min=4.6\times10^8\times\frac{0.01m}{\frac{1}{60}h}=4.6\times10^8\times0.6\ m/h\\\\=\boxed{2.76\times10^8\ m/h}\\\\Answer:\fbox{A.}
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Answer:

Julio travel <u>3 hours</u> by biking and <u>4 hours</u> by walking.

Step-by-step explanation:

Given:

Julio started biking to the park traveling 8 mph, after some time the bike got a flat so Julio walked the rest of the way, traveling 7 mph.

If the total trip to the park took 7 hours and it was 52 miles away.

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The speed travelled by the walking = 7 mph.

Let the time Julio travel with bike be x.

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And, the distance travelled by walking:

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<em>Subtracting both sides by 49 we get:</em>

x=3.

<em>The time Julio travelled with bike = 3 hours.</em>

Now, to get the time Julio travelled by walking by substituting the value of x:

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<em>The time Julio travelled by walking = 4 hours.</em>

Therefore, Julio travel 3 hours by biking and 4 hours by walking.

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