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  • anonymous
Need help with some work.
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anonymous
  • anonymous
Need help with some work.
Mathematics
schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
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anonymous
  • anonymous
The function below shows the number of students of a school who enrolled for ballet classes. Let f(x) represent the total number of students who enrolled for the classes after x years: f(x) = 12(1.06)x The average rate of change in the number of students who enrolled for ballet classes from the third to the fifth year is ________students per year.
anonymous
  • anonymous
ganeshie8
  • ganeshie8
can you double check if there are any typoes in the function i think the "x" should be in the exponent

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anonymous
  • anonymous
f(x) = 12(1.06)^x
ganeshie8
  • ganeshie8
Okay great! i hope you see the difference between \(12(1.06)x\) and \(12(1.06)^x\)
ganeshie8
  • ganeshie8
they are not same
anonymous
  • anonymous
tbh, no. This chapter made 0 sense to me at all.
ganeshie8
  • ganeshie8
don't wry, you will get it eventually if u persist
ganeshie8
  • ganeshie8
"average rate of change" is same as the "slope"
ganeshie8
  • ganeshie8
read the problem again, what exactly are we asked to find ?
anonymous
  • anonymous
Is this how you do the graph to find the difference? f(x) = 12(1.06)^x 1 12.72 2 13.47
ganeshie8
  • ganeshie8
you need to find the points when x = 3 and x = 5 not when x = 1 and x = 2
ganeshie8
  • ganeshie8
f(x) = 12(1.06)^x f(3) = 12(1.06)^3 = ?
anonymous
  • anonymous
but is that how i do it? 1 12.72 2 13.48 3 14.29 4 15.14 5 16.05
ganeshie8
  • ganeshie8
okay, look at the highlighted points 1 12.72 2 13.48 `3 14.29` 4 15.14 `5 16.05`
ganeshie8
  • ganeshie8
we need only them because we're asked to find the average rate of change between years 3 and 5
ganeshie8
  • ganeshie8
find the slope of those two points and you're done!
ganeshie8
  • ganeshie8
remember the slope formula ?
anonymous
  • anonymous
so i would do mean to find the difference? 14.29+15.14+16.05=45.48 45.48/3= 15.16 difference?
ganeshie8
  • ganeshie8
no
anonymous
  • anonymous
hmm
ganeshie8
  • ganeshie8
(3, 14.29) and (5, 16.05) slope = (16.05 - 14.29) / (5-3) = ?
ganeshie8
  • ganeshie8
Looks good! 0.88 is the average rate of change between years 3 and 5
anonymous
  • anonymous
ok cool! 1 more?
anonymous
  • anonymous
thank you for your help by the way!
ganeshie8
  • ganeshie8
yw

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