Asked by Emily J

A jumping spider jumps from a log onto the ground below. Its height, h, in centimetres, as a function of time, t, in seconds, since it jumped can be modelled by the function h(t) = -490t^2 + 75t + 12.When does the spider land on the ground? ___ seconds (answer to 1 decimal place)

So I thought the answer would be 0.2 because parabolas are symmetric but my online assignment says it's not. Please help!
Answered by Steve
it lands when the height is zero. That is when t ≈ 0.25

How did symmetry lead you to the answer of 0.2?
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