Suppose That the Waiting Time for a License Plate Renewal

question 46

Multiple Choice

Suppose that the waiting time for a license plate renewal at a local office of a state motor vehicle department has been found to be normally distributed with a mean of 30 minutes and a standard deviation of 8 minutes.Suppose that in an effort to provide better service to the public,the director of the local office is permitted to provide discounts to those individuals whose waiting time exceeds a predetermined time.The director decides that 15% of the customers should receive this discount.What are the numbers of minutes they need to wait to receive the discount?

• A)34.48
• B)21.68
• C)38.32
• D)25.52

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Definitions:

Nitric Acid

A highly corrosive mineral acid (HNO3) widely used in the manufacture of fertilizers and explosives, and in various organic synthesis processes.

Sulfuric Acid

A highly corrosive, dense, oily liquid acid, H2SO4, used in a variety of industrial processes like fertilizer production and in lead-acid batteries.

Pyridine

A basic heterocyclic organic compound with the chemical formula C5H5N, known for its distinctive, unpleasant smell.

2-Methyl-2-Butanamine

An organic compound with a tertiary amine and a methyl group on the second carbon of a butane chain.