someone please help with my algebra :(

Question

comrad · Answer

@Para_phrenic88 How can I help you?

anonymous · Answer

ive got around7 or 8 questions but if you could just help me with a few that would be awesome.

comrad · Answer

Alright mate! Fire away.

anonymous · Answer

how many years (to the nearest hundreth) would it  take an investment to double at 4% APR compounded continuously?

anonymous · Answer

if you want another question then let me know.

comrad · Answer

@Luigi0210 
@dan815 
@Hayhayz 
@Awolflover1 
@myah
Anybody know how to do interest problems? It's been a while since I've done em.

hayhayz · Answer

I CANT MATHHHH

rhondasommer · Answer

lol well what is your base amount you started with?

comrad · Answer

SAME! Like I have a concept of how to do it but I don't want to give incorrect information.

anonymous · Answer

there is no base, thats all it gives me

comrad · Answer

Well then I believe that question is broken my friend.

comrad · Answer

Well what are your options?

rhondasommer · Answer

ewww. yeah thats a gross question

anonymous · Answer

its fill in the blank :( lol

anonymous · Answer

ive got others, hold on

comrad · Answer

ONE AT A TIME MATE!

anonymous · Answer

its logarithms

comrad · Answer

Ooh, Logarithms and Interest. They don't go well together. Did you try Khan Academy?

anonymous · Answer

yah ive used it b4

jim_thompson5910 · Answer

`how many years (to the nearest hundreth) would it  take an investment to double at 4% APR compounded continuously?`

A = P*e^(rt)
2P = P*e^(rt) ... replace A with 2P (investment P doubling)
2 = e^(r*t)
2 = e^(0.04*t) ... plug in the interest rate r = 4% = 0.04

use natural logs to isolate t