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Alina [70]
3 years ago
11

On the coldest night in Oymayakon, Russia, the temperature dropped from 0°C to -20 C in 5 hours What is the average temperature

change per hour
Mathematics
1 answer:
zaharov [31]3 years ago
7 0

Answer: -4 degrees C per hour


Step-by-step explanation:


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The answer is B.

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Ms. Anguiano is enjoying a bicycle ride on a country road
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Answer:

The rate is 13 miles per hour

Step-by-step explanation:

* Lets explain how to solve the problem

- Jim lives three miles east of State College

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- Annie lives four miles north of State College

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- The east is perpendicular to the north

* Lets solve the problem

∵ At noon means 12 p.m

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∵ Jim walked for 1 hour and Annie bicycled for 1 hour

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∴ Jim walked = 2 × 1 = 2 miles

∴ Annie bicycled = 8 × 1 = 8 miles

- Lets calculate the distance of Jim from the State College till his

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∵ Jim lives three miles east of State College

∴ His distance at 1 p.m = 3 + 2 = 5 miles east

- Lats calculate the distance of Annie from the State College till her

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∵ Annie lives four miles north of State College

∴ Her distance at 1 p.m = 4 + 8 = 12 miles North

- Lets find the distance between them at 1 p.m

∵ The north ⊥ east

- Use Pythagoras Theorem to find the distance

∴ The distance = √(5² + 12)² = √(25 + 144) = √169 = 13 miles

- The rate = distance/time

∵ The distance between them is 13 miles in 1 hour

∴ The rate = 13/1 = 13 miles per hour

* The rate is 13 miles per hour

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