Mathematics, 22.06.2019 12:00 ayoismeisalex

# Mark is in a deep hole looking for treasure. he is standing 8 feet below the surface. he throws an old coin he found with an initial upward velocity of 22 ft/sec. how long until it lands outside the hole, having gone up and come back down? use the formula where h is the height of the coin in feet (relative to the surface) and t is the time in seconds since mark threw it. ignore air resistance and round your answer to the nearest tenth.

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Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

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Mark is in a deep hole looking for treasure. he is standing 8 feet below the surface. he throws an o...

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