Modeling Exponential Decay
Which of these equations correctly represents the following scenario: In her prime, 40 million people knew who Britney Spears was, but that number has decreased by 10% yearly. Since 90% of people still recognize her each year, what equation calculates how many people still know who Britney Spears is after a given number of years?
A
y = 0.1x + 40,000,000
B
y = 40,000,000(0.01)x
C
y = 40,000,000(0.9)x
D
y = 0.9(40,000,000)x
E
y = 0.01(40,000,000)x