Answer:

Step-by-step explanation:
we know that


Let
x ------> new battery life
The equation that represent this situation is

convert to mixed number

Answer:
15
Step-by-step explanation:
The absolute value takes any value and makes it positive.
|15| = 15
Answer:
$10,530
Step-by-step explanation:
I = Prt
P = 19500
r = 0.06
t = 9
I= 19500 x 0.06 x 9
I = 10530