Data shows that your client's ad that appears to people in san francisco gets 120 conversions at a cost of us$1200 and cost-per-acquisition (cpa) of us$10, while ads showing in houston get 70 conversions at a cost of us$1400 and cpa of us$20. if you have a cpa goal of us$12, what bid adjustment would you set for each location? +40% for san francisco, -20% for houston +20% for san francisco, -40% for houston +40% for san francisco, -40% for houston +20% for san francisco, -20% for houston

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