NEED HELP ASAP!!Which one of the following functions is an exponential decay function? A.) f(x) = 3x - 8

B.) f(x) = -2x + 4

C.) f(x) = -x2 - 5

D.) f(x) = 2(0.25)* + 1

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?