A state's labor department conducted a study regarding the mean yearly earnings per household in their state. The department randomly selected 533 households in their state and found their mean yearly earnings to be $49,829.00. The department also found the standard deviation of the sample to be $933.00. What is the margin of error, assuming a 90% confidence level?

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?

Paul can type 60 words per minute and jennifer can type 80 words per minutes.how does paul's typing speed compare to jennifer's

Julie begins counting backwards from 1000 by 2’s and at the same time tony begins counting forward from 100 by 3’s.   if they count at the same rate, what number will they say at the same time?