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secondary 3 | A Maths
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how to do(;´༎ຶД༎ຶ`)！！helpppp ！tqvmm

Date Posted: 5 months ago
Views: 39

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Eric Nicholas K's answer
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Date Posted: 5 months ago
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Eric Nicholas K's answer
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The water jet must spray to at least a height of 10 m.

Two cases are possible.

One, the water reaches a maximum height of 10 m (i.e. the curve intersects the line y = 10 at only one point).

Two, the water passes a height of 10 m, attains a maximum height and then falls to 10 m (i.e. the curve intersects the line y = 10 at two distinct points).

Combine both cases and you have b2 - 4ac >= 0.
Date Posted: 5 months ago