Question

Which formula do you use for this one?

@jdoe0001

Answer 1

hmm have you covered logarithms yet?

Answer 2

No.

Answer 3

well... this one involves compound interest
and you'd need to find how long is "t" or years in \(\bf A=P\left(1+\frac{r}{n}\right)^{nt}\) which means you'd end up with a logarithmic equation

so if you haven't covered that yet... you may want to cover it firstly

Answer 4

Oh I thought you meant \[\log_{2} \] that stuff

Answer 5

@jdoe0001 What is n?

Answer 6

\(\bf A=P\left(1+\frac{r}{n}\right)^{nt}
\\ \quad \\
A=\textit{current amount}\\
P=\textit{original amount deposited}\\
r=rate\to r\%\to \frac{r}{100}\\
n=\textit{times it compounds per year}\\
t=years\)

Answer 7

so if your interest rate compounds semi-annually, that means twice a year
thus n = 2

if it compounds monthy, that means 12 times in 1 year,
thus n = 12

if it compounds bimonthly, that means 6 times in 1 year
so n = 6

if it compounds every two years, that means in 1 year is 1/2
n = 0.5
and so on

Answer 8

6,449.82\[(1+\frac{ 6.9 }{ 0.5 }) ^.5t\]

Answer 9

well. yes... but "t" is an exponent... that means you'd need to use a logarithm function

Answer 10

don't you just solve for "t" ?

Answer 11

yes you'd, after taking logarithm to both sides, with certain base
but you haven't covered that

Answer 12

6449.82(14.8) ^0.5t

Answer 13

well.... if you havent' covered logarithms.... I'd think this one wouldn't apply to yyoyu

Answer 14

I have to do it, it does apply.

Answer 15

May you walk me through it?

Answer 16

well... I have to dash for one.... but logarithms can be a whole chapter, or at least a few sections so... you can find good material though https://www.khanacademy.org/math/algebra2/logarithms-tutorial

Answer 17

:/