Answer:
Option B -49
Step-by-step explanation:
-(7^-3)(7^5)
-1/7^3×7^5
-7^2
-49
So option B is correct
X=18
Because you would add 2 to both sides so it would be x=16+2 which equals 18
$3.00-$2.40 = $0.60
$0.60/$3.00 = $0.2
$0.2x100 = 20% decrease
Manny is a incorrect his logic doesn't not provide any specific evidence to support his theory
