Johnny takes 15 minutes to fold laundry and 10 minutes to vacuum. Sarah takes 10 minutes to fold laundry and 8 minutes to vacuum. For Johnny, the per unit opportunity cost of laundry folding isvacuumingls) and the per unit opportunity cost of acuuming islaundry fold(s). 1.5:1.25 1.25; 4/5 1.5; 2/3 O 2/3, 4/5

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