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4 years ago

Hi:) anyone able to help with this question ? I don’t understand it. Thank you :)!

Mathematics

1 answer:

makvit [3.9K]4 years ago

6 0

It is possible for John to catch the key.

Explanation:

Given:

height, h = 6m

h = -11t² + 20t + 1

Substituting h = 6m in the equation

6 = -11t² + 20t + 1

11t² - 20t + 5 = 0

On solving the above quadratic equation we get

t = 1.5 seconds approximately.

Thus, we can say that John will be able to catch the key because the key reaches to him in 1.5 seconds.

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