Determine which quadratic equation reveals its maximum or minimum value without changing the form of the equation. A. y = x2 + 4x − 3 B. y = -3(x + 4)2 + 1 C. y = 2x2 − 5x + 4 − 10 D. y = -(x − 9)(x + 7)

Recall that the owner of a local health food store recently started a new ad campaign to attract more business and wants to know if average daily sales have increased. historically average daily sales were approximately $2,700. the upper bound of the 95% range of likely sample means for this one-sided test is approximately $2,843.44. if the owner took a random sample of forty-five days and found that daily average sales were now $2,984, what can she conclude at the 95% confidence level?