Wendy initially has 6 hours of pop music and 3 hours of classical music in her collection. Every month onwards, the hours of pop music in her collection is 9% more than what she had the previous month. Her classical music does not change. Which function shows the total hours of music she will have in her collection after x months?
f(x) = 6(1.09)x + 3
f(x) = 3(1.09)x + 6
f(x) = 6(0.09)x + 3
f(x) = 3(0.09)x+ 6
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all of the x's are exponents
f(x) = (starting amount of the changing one)(1+rate)^(time) + (starting amount of non-changing one)
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c is the right one right?
(starting amount of the changing one) = 6 hours of pop
(rate of pop) = 9% = 0.09
(time) = months = x
(starting amount of non changing) = 3 hours of classical
see that I said (1+rate)
not just (rate)
oh so A
The following table shows the expressions that represent the sales of 4 companies:
Company A B C D
Sales 170(1.04)x 330(1.80)x 250(0.06)x 120(1.09)x
Rank the company sales by smallest to largest percent of increase and select the correct answer below.
A, B, C, D
A, C, B, D
D, A, C, B
C, A, D, B