Looking for something else?

Not the answer you are looking for? Search for more explanations.

## More answers

Looking for something else?

Not the answer you are looking for? Search for more explanations.

- smurfy14

lnx=-2.046 help??

At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga.
Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus.
Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

Get our expert's

answer on brainly

SEE EXPERT ANSWER

Get your **free** account and access **expert** answers to this

and **thousands** of other questions.

Get your **free** account and access **expert** answers to this and **thousands** of other questions

- smurfy14

lnx=-2.046 help??

- schrodinger

I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!

Get this expert

answer on brainly

SEE EXPERT ANSWER

Get your **free** account and access **expert** answers to this

and **thousands** of other questions

- anonymous

If you are trying to solve for x you need to isolate x. To do this here we need to get rid of the ln on the left side...how can we do this?

- smurfy14

divide

- anonymous

Only problem with division here is that ln is a defined function itself, so dividing it does no good.

Looking for something else?

Not the answer you are looking for? Search for more explanations.

- smurfy14

so instead you would do e^-2.046 right??

- anonymous

Yes :) You would take e to the power of both sides get what you said on the right, and since e is the inverse of ln, they cancel and form 1.

- smurfy14

oh ok cool :) thanks! do you think you could help me with one more?

- anonymous

Sure.

- smurfy14

The temp of an ingot upon being immersed in water kept at 20 degrees Celcius is 20+670e^-5t after t minutes. How long will it take for the temp to reach 25 degrees celcius?

- smurfy14

for starters, do you know what formula i need to use?

- anonymous

The formula is given. 20+670e^(-5t)=desired temp.

- anonymous

20+670e^(-5t)=25

- smurfy14

ohh ok

- anonymous

So you need to do the same thing. Isolate t since that is what it is asking for.

- smurfy14

so first i subtract 20 right?

- anonymous

Yes :)

- smurfy14

so the next steps would be:
ln670+lne^(-57)=ln5
and then would you move the -5t in front of the lne?

- anonymous

You want to take 5 and divide by 670. This will leave you with e^(-5t)=5/670 From here you can do the opposite of last time, which you got right, take the ln of both sides leaving -5t=ln(5/670)

- smurfy14

oh ok! so i would get -0.992 as the final answer correct?

- smurfy14

um i dont think i did the last step correctly?

- anonymous

I got about .980 seconds...remember time will never be negative and you can always plug your answer back in to see if it comes out right.

- smurfy14

ok ok i see what i did wrong thanks! :)

- anonymous

No problem. :)

Looking for something else?

Not the answer you are looking for? Search for more explanations.