Suppose that y = 21(1.07)x, represents book sales in billions of dollars since 2000. X represents the number of years after 2000. Predict the book sales for 2010 (x = 10), to the nearest billion.

$41 billion

$39 billion

$44 billion

$36 billion

Question

Suppose that y = 21(1.07)x, represents book sales in billions of dollars since 2000. X represents the number of years after 2000. Predict the book sales for 2010 (x = 10), to the nearest billion.
 
		
$41 billion
 		
$39 billion
 		
$44 billion
 		
$36 billion

anonymous · Answer

$$y=21*1,07^{x}$$
so for 2010 just put x=10 in this formula