Answer:
$12
Step-by-step explanation:
(3x + 5)(x - 4)
Given
x(3x + 5) - 4(3x + 5) ← factor out (3x + 5) from each term
= (3x + 5)(x - 4) ← in factored form
10^8=100000000
100000000x6.71=671,000,000
40% decrease