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October 1, 2014

October 1, 2014

Posted by **Jus** on Thursday, May 21, 2009 at 2:58pm.

a) how long will it take for the amount of caffeine to drop to 20% of the amount consumed?

My answer (which is correct)

= 11.6

b) suppose you drink a cup of coffee at 9 am. What percent of the caffeine will remain in your body at noon?

My attempt:

9=5(logP/log0.5)

then I solved for P, but the answer is wrong.

Could you please help me with part b?

- Math -
**Reiny**, Thursday, May 21, 2009 at 3:36pmYour value for t should be 3, not 9

from 9:00 am to noon is 3 hours.

- Math -
**Janny**, Thursday, January 5, 2012 at 2:32pmHow do you sovle for P

- Math -
**helena**, Monday, January 23, 2012 at 9:58pmpls tell me how to solve for p

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