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<h2>9 ft</h2>
Step-by-step explanation:
The height of kangaroo after it jumps is represented by the function , where
is in seconds, height is in feet.
To find the maximum height that the kangaroo jumps, we need to maximise .
The minimum/maximum value of a quadratic expression is given by
.
As the coeffecient of quadratic term is negative, the function has a maxima.
Maximum value = .
∴ Maximum height = 9 ft