Suppose you buy a piece of office equipment for $18,000. After 4 years you sell it for a scrap value of $4,000. The equipment is depreciated linearly over 4 years. The value of the piece of equipment after 3 years is (rounded to the nearest whole dollar)

a) $15,375

b) $4,000

c) $15,667

d) $9,600

e) $7,500

f) None of the above.

Use the appropriate normal distribution to approximate the resulting binomial distributions. A convenience store owner claims that 55% of the people buying from her store, on a certain day of the week, buy coffee during their visit. A random sample of 35 customers is made. If the store owner's claim is correct, what is the probability that fewer than 23 customers in the sample buy coffee during their visit on that certain day of the week?

a) 0.8238

b) 0.8643

c) 0.8980

d) 0.8790

e) 0.9082

f) None of the above.