Friday

January 30, 2015

January 30, 2015

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

**Answer this Question**

**Related Questions**

MATH MIDDLE SCHOOL - I love chocolate and coffee. I begin by making one cup of ...

Math Middle School - Please help me solve this challenge problem: I love hot ...

Math - Erika eat 1/3 of a chocolate bar and gave the remaining 2/3 of the ...

Algebra - Hot Java Coffee Company adverties their decaffeinated coffee as 97% ...

statistics - The caffeine content of a cup of home-brewed coffee is a normally ...

math - A cup of brewed tea has 54 milligrams less caffeine than a cup of brewed ...

English - 1. I drink a coke. 2. I drink a Coke. 3. I drink cola. 4. I drink a ...

Chemistry - At a local convenience store, you purchase a cup of coffee, but, at ...

Biochemistry - Hi, In this task for our school, we were requested to investigate...

Algebra - A cup of coffee contains about 100mg caffeine. The exponential ...