A grocery store is trying to figure out how many delivery trucks it should purchase for the delivery of online grocery purchases. It currently has one delivery truck but business is expanding, so the company is considering adding up to 3 more trucks. The fixed and variable costs of owning a fleet of 2, 3 or 4 delivery trucks for 100, 200 or 300 grocery orders per week is shown in the table below. Currently the grocery store is delivering 100 orders per week. A neighboring grocery store has the same cost structure and is also facing 100 orders per week., what should they do to minimize cost

Sales at a fast-food restaurant average $6,000 per day. the restaurant decided to introduce an advertising campaign to increase daily sales. to determine the effectiveness of the advertising campaign, a sample of 49 days of sales were taken. they found that the average daily sales were $6,300 per day. from past history, the restaurant knew that its population standard deviation is about $1,000. if the level of significance is 0.01, have sales increased as a result of the advertising campaign? multiple choicea)fail to reject the null hypothesis.b)reject the null hypothesis and conclude the mean is higher than $6,000 per day.c)reject the null hypothesis and conclude the mean is lower than $6,000 per day.d)reject the null hypothesis and conclude that the mean is equal to $6,000 per day.expert answer