All new brands of golf balls to ensure that they meet certain specifications. one test conducted is intended to measure the average distance traveled when the ball is hit by a machine. suppose the company wishes to estimate the mean distance for a new brand to within 1.2 yards with 95% confidence. assume that past tests have indicated that the standard deviation of the distances the machine hits golf balls is approximately 11 yards. how many golf balls should be hit by the machine to achieve the desired accuracy in estimating the mean?

Stephen thublin invests $1,000,000 in a 45-day certificate of deposit with 6.55% interest. what is the total interest income from the investment?

Finally, the arena decides to offer advertising space on the jerseys of the arena’s own amateur volley ball team. the arena wants the probability of being shortlisted to be 0.14. what is this as a percentage and a fraction? what is the probability of not being shortlisted? give your answer as a decimal. those shortlisted are entered into a final game of chance. there are six balls in a bag (2 blue balls, 2 green balls and 2 golden balls). to win, a company needs to take out two golden balls. the first ball is not replaced. what is the probability of any company winning advertising space on their volley ball team jerseys?

Campus rentals rents 2 and 3 bedrooms apartments for $700 ans $900 a month respectively. last month they had six vacant apartments and reported $4600 in lost rent. how many of each type of apartment were vacant?