Give the Focus, Directrix, and Axis for the Parabola $\mathrm { t }$

question 47

Multiple Choice

Give the focus, directrix, and axis for the parabola.
-A projectile is thrown upward so that its distance above the ground after $\mathrm { t }$ seconds is $\mathrm { h } = - 15 \mathrm { t } ^ { 2 } + 480 \mathrm { t }$ . What is its maximum height?

• A) \(3840 \mathrm { ft }\)
• B) \(5760 \mathrm { ft }\)
• C) \(2880 \mathrm { ft }\)
• D) \(1920 \mathrm { ft }\)

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