There are 15 people in the chorus. each year, the number of people in the chorus increases by 12%. there are 30 people in the band. each year, 2 new people join the band.

part a: write functions to represent the number of people in the chorus and the number of people in the band throughout the years.

part b: how many people are in the chorus after 9 years? how many people are in the band after the same number of years?

part c: after approximately how many years is the number of people in the chorus and number of people in the band the same? justify your answer mathematically.

Part A
Chorus:
Expontential growth = b*a^x 
b = 15
a = 1.12              (a= r+1), r = 12%

Which gives a function of f(x) = 15*1.12^x 

Band
Linear growth = ax+b
a = 2
b = 30

Which gives a function of g(x)=2x+30

Part B:
f(9) = 15*1.12^9 = 41.59
g(9) = 2*9+30 = 48

Part C:
This is probably problem solving, where you're allowed to use calculators and other softwares.

Therefore you can use different softwares, and make f(x) = g(x).
I did this, and got it to 10.95427141

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£56

step-by-step explanation:

u divide 24 by 3 and u get 8 so if u do 8 time 7 or 8+8+8+8+8+8+8 u get 56 and 56 divided by 7 is 8.