Convert the Exponential Function to the Form Indicated $f ( x ) = 2.7 e ^ { - 0.7 x }$

Multiple Choice

Convert the exponential function to the form indicated. Round all coefficients to four significant digits.
$f ( x ) = 2.7 e ^ { - 0.7 x }$ ; $f ( x ) = A b ^ { x }$

A) $A = 3.7$ , $b = 0.62$
B) $A = 2.7$ , $b = 0.4966$
C) $A = 3.7$ , $b = 0.4946$
D) $A = 4.7$ , $b = 0.3621$
E) $A = 2.7$ , $b = 0.4969$