In developing an interval estimate, if the population standard deviation is unknown,

A) it is impossible to develop the interval estimate.
B) the standard deviation is arrived at using the range.
C) the sample standard deviation must be used.
D) it is assumed that the population standard deviation is 1.

A manufacturer of snowmobiles sells through distributors in some regions of the country, through wholesalers in other regions, and directly to retailers in its home province. The manufacturer gives a 25% trade discount to retailers, an additional 10% discount to wholesalers, and a further 7.5% discount to distributors. What net price does the manufacturer receive from each buying level on a snowmobile listed at $9,800?

How many feet and inches does a car traveling at 48 miles per hour cover in one second?

Compute the discount date, the due date, the amount of discount and amount of the remittance if the required remittance is paid within the discount period.Ray Marshall is a purchasing agent for East Coast Electric and tries to take advantage of all cash discounts on major purchases. On July 7 (invoice date) he purchased parts for service vehicles. The parts cost $3,824.77, but $214.40 worth were returned because they were incorrect. The terms from the supplier were 1/10, net 25.
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Change the mixed numbers to improper fractions and divide. Write the answers as fractions or mixed numbers in lowest terms.​
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a.
b.
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Hillary sells cosmetics from her part-time home-based business. She receives a straight commission of 21% from her supplier. At the year-end, she also receives a 7% bonus on sales exceeding her annual quota of $50,000. What will her gross annual earnings be for a year in which her average monthly sales are $5,500?