Qualification > Math
C1 Edexcel Jan2010 Question! Please help!
astarmathsandphysics:
a=129 r=114/120=0.95
ar^(n-1)<60
120*0.95^n<60
log120 +n log 0.95 < log 60
n?(log 60 -log 120)/log 0.95 =13.52
n=14
halosh92:
Q4
plz explain in detailsss
thx alotttt
astarmathsandphysics:
or you could just keep miultiplying 120 by 0.95 until your answer is less that 60
halosh92:
--- Quote from: astarmathsandphysics on April 27, 2010, 09:06:04 pm ---or you could just keep miultiplying 120 by 0.95 until your answer is less that 60
--- End quote ---
why do we do that?
could u be more specific plz?
nid404:
--- Quote from: halosh92 on April 27, 2010, 08:32:29 pm ---Q4
plz explain in detailsss
thx alotttt
--- End quote ---
Do you need the a) part as well? (i mean the curve)
b) sin-10.35= x-30
x=20.5o+30
=50.5o
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