emogirl100
  • emogirl100
A store had 235 MP3 players in the month of January. Every month, 30% of the MP3 players were sold and 50 new MP3 players were stocked in the store. Which recursive function best represents the number of MP3 players in the store f(n) after n months? f(n) = 0.7 × f(n − 1) + 50, f(0) = 235, n > 0 f(n) = 237 − 0.7 × f(n − 1) + 50, f(0) = 235, n > 0 f(n) = 0.3 × f(n − 1) + 50, f(0) = 235, n > 0 f(n) = 237 + 0.7 × f(n − 1) + 50, f(0) = 235, n > 0
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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emogirl100
  • emogirl100
@imqwerty @
emogirl100
  • emogirl100
@xapproachesinfinity
xapproachesinfinity
  • xapproachesinfinity
look for the pattern

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More answers

emogirl100
  • emogirl100
?
xapproachesinfinity
  • xapproachesinfinity
month of February we have 253 lets call that first month okay
emogirl100
  • emogirl100
ok
xapproachesinfinity
  • xapproachesinfinity
so month 1 we have 253 month 2 we 0.3x253+50 month 3 we have 0.3x(0.3x253+50)+50
xapproachesinfinity
  • xapproachesinfinity
lets see the pattern after n months
emogirl100
  • emogirl100
kk
xapproachesinfinity
  • xapproachesinfinity
or you could just check if those options work
xapproachesinfinity
  • xapproachesinfinity
check for first month n=1
xapproachesinfinity
  • xapproachesinfinity
oh they made n=0 the first month not n=1 let's check for n=0 do we get 253 for what option
emogirl100
  • emogirl100
A?
xapproachesinfinity
  • xapproachesinfinity
oh well all of them actually have f(0)=253 for n=0 do n=1 and check
emogirl100
  • emogirl100
ok giv a sec
xapproachesinfinity
  • xapproachesinfinity
the right one has to have for n=1 f(1)=125.9
xapproachesinfinity
  • xapproachesinfinity
oh no error i used 253 instead of 235
xapproachesinfinity
  • xapproachesinfinity
for n=1 we should get f(1)=120.5 not 125.9 that was a mistake ok
emogirl100
  • emogirl100
ok
xapproachesinfinity
  • xapproachesinfinity
A and B or not good since they don't work out
xapproachesinfinity
  • xapproachesinfinity
same for D if you cheched
xapproachesinfinity
  • xapproachesinfinity
so C works as an answer
emogirl100
  • emogirl100
ok thank you
xapproachesinfinity
  • xapproachesinfinity
if you tried the find the pattern you would have gotten the same formula doing month 0 we have 235 month 1 we have 0.3x235+50 month 2 we have 0.3x(0.3x235+50)+50 and so on....
xapproachesinfinity
  • xapproachesinfinity
f(0)=235 f(1)=0.3x235+50=0.3xf(0) f(2)=0.3x(0.3x235+50)+50=0.3xf(1)+50 f(3)=0.3xf(2)+50 we go following the pattern tell n f(n)=0.3xf(n-1)+50
xapproachesinfinity
  • xapproachesinfinity
@emogirl100

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