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Mathematics, 17.10.2021 09:20 TrueKing184

While Sarah was driving into the one-way tunnel to Domainville, she saw that the tunnel had a shape that could be modelled by the quadratic equation ℎ(��) = −12��2 − 2�� + 16 ,
where ℎ is the height (in metres) of the tunnel and �� is the horizontal distance (in metres).
a) How wide is the tunnel at the road surface?

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While Sarah was driving into the one-way tunnel to Domainville, she saw that the tunnel had a shape...
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