AT Oils, a gas station, retails 30,000 gallons of petrol per year. Its ordering costs are $20 per order and holding costs are $40 per gallon. According to the economic order quantity (EOQ) model, approximately how often should the company place a fresh order for petrol

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

The goal of an economist who formulates new theories is to a. provide an interesting framework of analysis, whether or not the framework turns out to be of much use in understanding how the world works. b. provoke stimulating debate in scientific journals. c. contribute to an understanding of how the world works. d. demonstrate that economists, like other scientists, can formulate testable theories.

You would like to purchase one class a share of berkshire hathaway through your scottrade brokerage account. scottrade charges a ​$6 commission for online trades. you log into your​ account, check the​ real-time quotes for berkshire hathaway​ (you see a bid price of ​$262 comma 900 and an ask price of ​$263 comma 730​) and submit your order. a. what is the current​ bid/ask spread for berkshire hathaway class a​ shares? b. if scottrade routes your buy order to the​ nyse, where berkshire hathaway is​ listed, what's the potential minimum your total transaction costs will​ be? c.​ if, instead, scottrade routes your buy order to​ nasdaq, where berkshire hathaway is not​ listed, what's the potential maximum your total transaction costs will​ be? d. regardless of how your trade is​ executed, based on the​ bid/ask spread, what is the market value of your​ trade? a. the current​ bid/ask spread for berkshire hathaway class a shares is ​$ nothing. ​(round to the nearest​ dollar.)