Friday

October 24, 2014

October 24, 2014

Posted by **Yasemine** on Monday, May 13, 2013 at 10:33pm.

1) ln(A) = -kt+ln(B)

solve for t

solve for k

solve for B

2) 1/(B) = kt + 1/(B)

solve for k

solve for t

solve for B

Thank you so much for your help. It is greatly appreciated

- Math -
**Reiny**, Monday, May 13, 2013 at 10:45pm1)

ln(A) = -kt+ln(B)

kt = lnB - lnA

kt = ln(B/A)

t = ln(B/A) / k

k = ln(B/A) / t

lnB = lnA + kt

B = e^(lnA + kt)

2)

1/B = kt + 1/B

0 = kt

t = 0

or

k = 0

B is any value except B≠0

(are you sure you have no typo in 2) ?

- Math -
**Yasemine**, Monday, May 13, 2013 at 10:50pm2) should be 1/(B) = kt+1(A)

I am dealing with concentrations and A and B are just placeholders for the concentrations.

Thanks

- Math -
**Reiny**, Monday, May 13, 2013 at 11:00pm2) I thought there was something wrong with your first typing of the question

1/B = kt + 1/A

multiply each term by AB, the LCD

A = ABkt + B

A - B = ABkt

t = (A-B)/(ABk)

k = (A-b)/(ABt)

from: A = ABkt + B

A = B(Akt + 1)

B = A/(Akt + 1)

**Answer this Question**

**Related Questions**

Chemistry - I am dealing with the integrated rate laws. Can somebody please help...

algebra - Not sure if I have the correct answer dealing with inequalities and ...

integrated algebra - i have this question and i kinda know how to do it but i'm ...

biology - find an instance of an ecological “mess” that has taken place in your...

Algebra - 89, 88, 78, 95, 92 Sadye has the Algebra test scores shown. If her ...

English - What a mess! (Does it mean the following?) What a mess it is! What a ...

math - how do you solve this problem? 1/2x - 3 = -1 Let me make sure I ...

Algebra - Your teacher is giving you a test worth 100 points containing 40 ...

Algebra II - I skipped algebra I so I never learned about matrices. If you had a...

algebra 1 - You are taking a Spanish course in which there will be four test. ...