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asambeis [7]
3 years ago
6

The function h defined by h(t)=(49 + 4.9t)(10 - t) models the height, in meters, of an object t seconds after it is dropped from

a helicopter.
From what height is the object dropped? Explain how you know.
Mathematics
1 answer:
kipiarov [429]3 years ago
5 0

Answer:

Step-by-step explanation:

Let's FOIL this out and get it into standard quadratic format:

h(t)=-4.9t^2+490. The lack of a linear term in the middle means therewas no upwards velocity, consistent with the object being dropped straight down as opposed to thrown up in the air tand then falling in a parabolic path. The -4.9t² represents the acceleration due to gravity, and the 490 represents the height from which the object was dropped. The constant in a quadratic that is modeling parabolic motion always represents the height from which the object was dropped (or launched). That's how you know.

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∵ The mean sale was 45

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To find z-score of the sale of mobile phones on that day substitute the values of x, μ, and σ in the formula of z-score

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Learn more:

You can learn more about z-score in brainly.com/question/7207785

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