You are ordering a meal and have $15 to spend on. the restaurant charges 6% sales tax and you plan to leave a 15% tip. the equation c= x+0.06x+0.15x gives the total cost c of your meal, where x is the cost before tax and tip. what is the maximum amount you can spend before tax and tip?

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?