solve this equation for x and round to the nearest 100th
1=In(x+4)

- anonymous

solve this equation for x and round to the nearest 100th
1=In(x+4)

- chestercat

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- welshfella

x + 4 = e^1 = e

- welshfella

solve for x

- anonymous

-4?

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## More answers

- welshfella

no
x + 4 = e not 0

- anonymous

-1.28

- welshfella

ln means log to the base e
you can find the value of e on your calculator

- anonymous

i used it

- welshfella

looks good

- welshfella

recall what logs are
|dw:1439319631515:dw|

- anonymous

it won't let me type the neg so i don't think it is neg

- welshfella

the log is an exponent

- anonymous

I'm confused on how to set it up

- welshfella

try practicing a few similar problems

- welshfella

like ;- transform to exponent form
log10 100 = 2
answer 10^2 = 100

- anonymous

okay i understand that one

- anonymous

i think I'm just overthinking this

- welshfella

maybe
remember that the log is the exponent and the base is the value that the goes 'under' the exponent

- welshfella

|dw:1439320224760:dw|

- anonymous

okay i get it kinda

- welshfella

yea with practice you will
if a get confused i write the log10 reelation then compare it with the one in the problem
log10 100 = 2
wand know that 100 = 10^2

- anonymous

okay yeah i get that part

- welshfella

so if we have
ln(x + 1) = 1
e relates to 10 , x + 1 relates to 100 and 1 relates to 2

- welshfella

remember that ln = log to the base e

- anonymous

but idk where your getting the e at

- anonymous

##### 1 Attachment

- anonymous

so e^in(x+4)=e^1

- anonymous

i got a neg number

- anonymous

-1.28

- freckles

that is right to the hundredths place
ln is the same as log_e
so the equation you had could have been written as:
\[1=\log_e(x+4) \\ e^1=x+4 \text{ is the same equation in exponential form } \\ e=x+4 \\ \]
and yes subtracting 4 on both sides gives you x is approximately -1.28

- anonymous

it said it was wrong

- freckles

-1.28 is right

- freckles

the equation you typed was 1=ln(x+4)
which does imply to the 100ths
x=-1.28

- anonymous

my school said that is was wrong..

- welshfella

well your school is wrong

- welshfella

are you sure your question is correct?

- freckles

or the equation he typed is not the equation he should have typed

- welshfella

yes

- freckles

or... there is one other or but very unlikely
the meaning of ln in most subjects mean log base e
maybe ln means log base 2 because he is in computer science :p

- welshfella

oh - i've never seen ln defined that way..

- anonymous

pleaseeeeeeeeeeeeee come to my question! :) @welshfella

- anonymous

i copied and pasted and we even used the right formula and everything

- freckles

sometimes copy and paste doesn't work out so smoothly
because you copying and pasting from a format that doesn't always translate over smoothly

- freckles

the equation looks exactly like 1=ln(x+4) ?

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