Acleaning company uses 10 lbs each of chemicals a, b and c for each house it cleans. after some quality complaints, the company has decided to increase its use of chemical a by an additional 10 lbs for each house. by what % has productivity (houses per pound of chemical) fallen? a) 0% b) 10% c) 15% d) 25% e) 33%

What two things do you consider when evaluating the time value of money

Which ranks these careers that employers are most likely to hire from the least to the greatest?

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