Saturday

August 23, 2014

August 23, 2014

Posted by **Phoebe** on Monday, March 4, 2013 at 5:27pm.

300=70+(375-70) e^ -k*10

230=305 e^-10*k

ln 230=ln 305 e^-10*k

ln 230= ln 305 -10*k

- more of the same -
**Steve**, Monday, March 4, 2013 at 5:39pmyes, you do get off track.

Line 3 should be

(because ln ab = ln a + ln b)

ln 230=ln 305 + ln( e^-10*k)

ln 230 - ln 305 = -10k

because ln(e^x) = x

now go from there.

In fact, I'd have divided first:

230=305 e^-10*k

230/305 = e^-10k

- more of the same -
**Steve**, Monday, March 4, 2013 at 5:42pm201.7? I get nothing like that

.75 = e^-10k

-10k = -.287

k = .0287

There must be something wrong with the way you wrote the problem.

I mean e^(-10*201.7) = a very very very tiny number. Some missing parentheses?

**Related Questions**

Physıcs - A tennıs ball travel wıth ınıtıal veloc...

social studies(history) - 1 – Tanzimat ile Meşrutiyet yönetimlerinin Osmanl...

Chemistry - how about expressing 230 parts per thousand (ppt) of SO4^2- in mol ...

Math - I was to find the sum or difference of each problem: A) 15.6 + 8.305 + 0....

college physics - A current of 2.7 A flows in a straight wire segment of length...

algebra help - I am really confussed on this question can some one help me out ...

business statistics - for a sample of 12 items from a normally distributed ...

Physics - An old car is traveling down a long, straight, dry road at 25.0 m/s ...

College Physics - A 4.8 kg object is subjected to two forces, F~ 1 = (2.8 N) ˆ&#...

Physıcs - Formula force calculatıng force