anonymous
  • anonymous
can anyone help me with solving problems with Exponential and Logarithmic
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
whats the prob be?
anonymous
  • anonymous
holly wants to save money for an emergency. holly invests $1200 in an account that pays an interest rate of 4%. how many years will it take for the account to reach $15,400? round your answer to the nearest hundredth
amistre64
  • amistre64
15400=1200(1.04)^t

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amistre64
  • amistre64
154 ---- = 1.04^t 12
amistre64
  • amistre64
t = log1.04(154/12)
anonymous
  • anonymous
140.714 is what i got. correct?
amistre64
  • amistre64
we can do change of base to be able to do this on a calculator...
amistre64
  • amistre64
log(154/12) ---------- log(1.04)
amistre64
  • amistre64
65.07 years?
amistre64
  • amistre64
you can always double check by plugging your answer into the original...
amistre64
  • amistre64
15400 ?=? 1200(1.04)^(65.07)
amistre64
  • amistre64
15400.706
anonymous
  • anonymous
so 65.07 is correct?
amistre64
  • amistre64
i believe it is..... but i dont know how your program accepts its answers.... it may be off by 1/100
anonymous
  • anonymous
it was right!
amistre64
  • amistre64
yay!!
anonymous
  • anonymous
You invest $4,900 in an account that pays an interest rate of 5.5%, compounded continuously. Calculate the balance of your account after 6 years. Round your answer to the nearest hundredth,
amistre64
  • amistre64
cant get medals if no new questions are posted lol.....
amistre64
  • amistre64
pert again....
amistre64
  • amistre64
4900(e^(.055)(6))
amistre64
  • amistre64
plug that into google and the calc will spit back an answer

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