On monday, neil tells outdoor landscaping, inc., that he will pay outdoor $500 if a variety of tasks are completed by friday.

on wednesday, when outdoor is more than half done with the work, neil says that he has changed his mind.

these parties had :

a. an expired contract when neil said that he had changed his mind.

b. a quasi contract when neil said that he would pay for certain work.

c. a unilateral contract as soon as outdoor began to perform.

d. no contract.

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