Certain drugs are eliminated from the bloodstream at an exponential rate. Doctors and pharmacists need to know how long it takes for a drug to reach a certain level to determine how often patients should take medications. Answer the following questions about this situation.

1. Select the correct statement:
   • More of the drug will be eliminated in the first hour than in the second hour.
   • The same amount of the drug will be eliminated in the first hour as in the second hour.
   • Less of the drug will be eliminated in the first hour than in the second hour.
2. Write an exponential equation for the following situation. The drug dosage is 500 mg. The drug is eliminated at a rate of 14% per hour. Use D = the amount of the drug in milligrams and t = time in hours.
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3. How much of the drug is left after 8 hours? Round to the nearest milligram.
   milligrams
4. How many hours will it take until half of the drug remains? Round to the nearest tenth of an hour.
   hours