Question

A cup of coffee contains 150 milligrams of caffeine. if caffeine is eliminated from the body at a rate of 14% per hour, how long will it take for half of this caffeine to be eliminated from a person's body? round your answers to the nearest hour

A. 7 hours B. 6 hours C. 5 hours
D. 4 hours​

Answer 1

Explanation:

14% of 150 mg = 0.14* 150 = 21 mg

21 mg will be eliminated from our body in an hour

150/21 =
`7(3)/(21)`

= 7 hours { rounding to the nearest}