anonymous
  • anonymous
A motor scooter purchased for $1,000 depreciates at an annual rate of 15%. Write an exponential function, and graph the function. Use the graph to predict when the value will fall below $100.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
You must be able to start this one off for yourself. Can you show us what you have so far?
anonymous
  • anonymous
1000(1.15)=100?
anonymous
  • anonymous
hi

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More answers

anonymous
  • anonymous
hi
anonymous
  • anonymous
can u help me :)
anonymous
  • anonymous
ok ask you self . what is the value of motor scooter after 1 year?
anonymous
  • anonymous
150$....
anonymous
  • anonymous
?
anonymous
  • anonymous
no
anonymous
  • anonymous
so what the question is really saying is , the value of motor scooter goes down by 15%.
anonymous
  • anonymous
100 = 1000e^(-0.15t)
anonymous
  • anonymous
850$
anonymous
  • anonymous
@SNSDYoona we dont give answers out like that.
anonymous
  • anonymous
1000 = the starting money that u purchased it the basic formula for this exponential decay and growth functions is A= Ye^(kt)
anonymous
  • anonymous
thts why i give him the answer first to see if he does any calculation wrong then explain to him if he doesnt get it
anonymous
  • anonymous
thats why we don't give answers out. you need to explain the exponential formula. Not just stated it!!!
anonymous
  • anonymous
A = the amount u left after a certain period of time Y = initial amount started with k = ur rate of decay/growth t= the time
anonymous
  • anonymous
0.1=(-0.15t)
anonymous
  • anonymous
?
anonymous
  • anonymous
have u learn natural logs?
anonymous
  • anonymous
from 100 = 1000e^(-0.15t) u simplify it then u get down to 0.1= e^(-0.15t) then u take the natural logs off both side u get ln(0.1) = -0.15t then u solve for t ln(0.1)/0.15 = t
anonymous
  • anonymous
i got 0.666
anonymous
  • anonymous
u shud get 15.35
anonymous
  • anonymous
use ur calculator.. did u type in correctly?
anonymous
  • anonymous
i divide .1 by .15?
anonymous
  • anonymous
nonono u use ln << ln = natural log
anonymous
  • anonymous
look at ur calculator and search for ln
anonymous
  • anonymous
press ln and then (0.1)
anonymous
  • anonymous
then divide by (-0.15)
anonymous
  • anonymous
im using google calculator i dont have 1
anonymous
  • anonymous
15.3?
anonymous
  • anonymous
yeap
anonymous
  • anonymous
v(t) = 0.85(1000)t; the value will fall below $100 in about 18 yr. v(t) = 1000(0.85)t; the value will fall below $100 in about 18 yr. v(t) = 0.85(1000)t; the value will fall below $100 in about 14.2 yr. v(t) = 1000(0.85)t; the value will fall below $100 in about 14.2 yr.
anonymous
  • anonymous
u still there
anonymous
  • anonymous
hi
LiamMcBay
  • LiamMcBay
hi

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