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joja [24]
3 years ago
14

2(3h - 9) when h = 4.2

Mathematics
2 answers:
Anastaziya [24]3 years ago
8 0

<em><u>Hope</u></em><em><u> </u></em><em><u>t</u></em><em><u>h</u></em><em><u>i</u></em><em><u>s</u></em><em><u> </u></em><em><u>will</u></em><em><u> </u></em><em><u>help</u></em><em><u> </u></em><em><u>u</u></em><em><u>.</u></em><em><u>.</u></em><em><u> </u></em>

VikaD [51]3 years ago
4 0

Answer:

7.2

Step-by-step explanation:

2(3h - 9) when h = 4.2

Plug the value into the expression

We have

2 (3 x 4.2 - 9)

2(12.6 - 9)

Simplify the bracket

2 (3.6)

2 x 3.6

7.2

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Answer:

246 ft is the maximum height

Step-by-step explanation:

The height h given above is a quadratic function. The graph of h as a function of time t gives a parabolic shape and the maximum height h occur at the vertex of the parabola. For a quadratic function of the form h = a t² + bt + c, the vertex is located at t = - b / 2a. Hence for h given above the vertex in the question s(t) = 124 + 64t − 16t², is at t

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