Question

Q = ((1.13)^t) / 20

Answer 1

@Euler271

Answer 2

@Loser66

Answer 3

\(20Q = (1.13)^t\) ok?

Answer 4

i just need to say what is the
- starting value a
- growth rate r
- & continuous growth rate k

Answer 5

k then what..

Answer 6

ln both sides to get t down

Answer 7

ln 20Q = ln (1.13)^t = t ln (1.13)
so, ???

Answer 8

but its 20q so both sides have a variable.. can u still take the ln?

Answer 9

\(\large t = \dfrac{ln20Q}{ln(1.13}= log _{1.13}20Q\)

Answer 10

ok. then?

Answer 11

then waaat? I ask you what Q mean, you said "It's just a part of equation" so, I solve it as if it is a "nonsense letter" , now then??? how can I know what should I do next?

Answer 12

sorry...

Answer 13

well in logarithms and all that stuff they have equations like Q=ab^t or Q= ae^kt

Answer 14

the general equation of this is:

\[Q = ar^{kt}\]

Answer 15

ok

Answer 16

a = 1/20
r = 1.13
k = 1

Answer 17

oooooh. definition. got you @Euler271

Answer 18

i may have inverted r and k.

yea ^_^

Answer 19

k thnks @Euler271. BUT ONE QUESTION. why is k just 1?

Answer 20

because of the equation you gave

since it is r^(kt)

1.13^(kt) = 1.13^(t)

k = 1

Answer 21

i thought itd be ln1.13