Mary Jane Sterling - Algebra II - 1001 Practice Problems For Dummies (+ Free Online Practice)

311–320 Write the equation of the parabola in the standard form . Then identify the vertex.

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321–330 Sketch the graph of the parabola.

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331–340 Solve the following quadratic applications.

331. The height of a rocket (in feet), t seconds after being shot upward in the air, is given by . How high does the rocket rise before returning to the ground?

332. The height of a rocket (in feet), t seconds after being shot upward in the air, is given by . How long does it take before hitting the ground?

333. The height of a ball, t seconds after being shot upward in the air, is given by . How high does the ball get before returning to the ground?

334. The height of a ball, t seconds after being shot upward in the air, is given by . How long does it take before hitting the ground?

335. The amount of profit (in dollars) made when x items are sold is determined with the profit function . How many items must be sold before the “profit” is positive?

336. The amount of profit (in dollars) made when x items are sold is determined with the profit function . What is the greatest possible profit?

337. The average number of skis per day sold at a sports store during the month of January is projected to be , where n corresponds to the day of the month. On what day is the greatest number of skis expected to be sold?