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2 years ago

Mrs. Markum took her family to a restaurant for dinner. The bill was $39.50.

Mathematics

1 answer:

ioda2 years ago

5 0

Answer: $41.47

Step-by-step explanation: .15 x 39.50 = 5.925 (round up to 5.93), 39.50-5.93=33.57, .20 x 39.50 = 7.90, 33.57 + 7.90 = $41.47

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1 year ago

A rubber ball is dropped from the top of a hole. Exactly 20 seconds later, the sound of the rubber ball hitting bottom is heard.

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9514 1404 393

Answer:

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Step-by-step explanation:

We assume your falling-distance formula is supposed to be ...

s = 16t²

So, the time required to fall distance s is ...

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Then the sum of the time for the ball to fall and the time for the sound to travel back is ...

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Only the smaller of these two solutions makes any sense in this problem.

The hole is about 4192.9 feet deep.

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<em>Additional comment</em>

The distance equation for the falling object presumes a vacuum. The sound transmission presumes the presence of air, so the question setup is self-contradictory.

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Step-by-step explanation:

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Step-by-step explanation:

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