A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 3 years ago
how to use "In"?
anonymous
 3 years ago
how to use "In"?

This Question is Closed

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0I have this question.. and I know i Have to use In... but dont know how Brooklyn has a goal to save $8,000 to buy a new entertainment system. In order to meet that goal, she deposited $4,132.79 into a savings account. If the account has an interest rate of 4.8% compounded quarterly, approximately when will Brooklyn be able to make the purchase?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.08000 = 4132.79(1+.048/12)^12*t 8000 = 4132.79(1.004)^12t (now I get stuck here..

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0\[4132.79\times (1+\frac{.048}{4})^{4t}=8,000\]

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0says QUARTERLY so be careful usually it is monthly

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0yah u right... misread

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0but then how do you continue... because that's when I get lost :/

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0then use the change of base formula \[b^x=A\iff x=\frac{\ln(A)}{\ln(b)}\]

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0what actually In use for... like, I understand nothing at all about In... (In=log right) ?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0\[4132.79\times (1+\frac{.048}{4})^{4t}=8,000\] \[4132.79\times (1.012)^{4t}=8,000\] \[1.012^{4t}=8,000\div 4132.79\]

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0and why is it use in this kind of formulas?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0\[1.012^{4t}=1.936\] rounded

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0the to solve for \(4t\) use \[4t=\frac{\log(1.936)}{\log(1.012)}\]

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0it doesn't matter what log you use

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0mmm... but why log? like.. what is its function? I never understood when the teacher explained it...

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0then i am sure i cannot explain it in a chat box here but basically \[b^x=y\iff \log_b(y)=x\]

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0thats the formula right?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0it is a way to solve for a variable that is in the exponent

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0mmmm.. got it.. the answer I got for the formula is t= 10.8 (then years and 8 month?)

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0but you only have two logs on your calculator, \(\log_{10}(x)\) log base ten and \[\ln(x)=\log_e(x)\] which is log base e so if you want an actual decimal for an answer, you have to use \[b^x=A\iff x=\frac{\ln(A)}{\ln(b)}\]

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0in my calculator i have log2, log10, and In... can use any true? (I used In)

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0in other words, to solve for the variable in the exponent, it is the log of the total divided by the log of the base that is how to solve for a variable that is in the sky

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0haha got it... so my answer is 10.8... how do i convert that into years and months?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0makes no difference, all logs are the same \[\log_b(x)=\frac{\log_a(x)}{\log_a(b)}\]

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0got it... but how do you convert t = 13.85 into years and months?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0what does \(t\) represent?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0so im guessing it would be 13 years and 8 months right?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0yes t is time in years

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0but in the choices I've got there is no 13 years and 8 month... (they have 13 years and 10 months) so I'm guessing is that one.. but they also have 13 years and 5 months... so like, i want to know how to solve it correctly...

anonymous
 2 years ago
Best ResponseYou've already chosen the best response.0Was 13 years and 10 months the correct answer?
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.