A technician is launching an aerial firework from a tower. The height of the firework is measured in feet and the time is measured in seconds. Two equivalent functions that model the firework's vertical distance with respect to time, x, are f(x) = -16x² + 1283 + 144 and f (x) = -16(3-4)+ 400. Use either equation to show algebraically when the firework will hit the ground.

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?