Answer:
The total nuber of hours that the battery can be used over its lifetime is 600.
Step-by-step explanation:
We use an infinite geometric series to solve this question.
The sum of all values of an infinite geometric series is given by the following equation:

In which  is the first term and r is the common ratio.
 is the first term and r is the common ratio.
After each charging, a battery is able to hold only 97% of the charge from the previous charging.
This means that 
The battery was used for 18 hours on its first charge before it had to be recharged.
This means that 
What is the total number of hours the battery can be used over its lifetime?

The total nuber of hours that the battery can be used over its lifetime is 600.
 
        
             
        
        
        
Answer: The answer has 3 forms!
- Decimal form: 3.3
- Exact form: 10/3
- Mixed Number form: 3 1/3
I hope that this helps! :D
 
        
                    
             
        
        
        
You would follow the order of operations
Parentheses
Exponents
Multiply/Divide
Add/Subtract
if it is multiply or divide, go from left to right. do the same if it is addition or subtraction
4000/10x2+4-8
first, do 4000/10
400x2+4-8
then do 400x2
800+4-8
then do 800+4
804-8
796
rounding to the nearest tens would make it 800
because 9 rounded up is 10
        
                    
             
        
        
        
C)
First, you can get rid of A and B because the y-intercept is 6 so it has +6 at the end
Next, the slope is rise over run, the graph goes up 2 and over 3 so it should be 2/3.
2/3x + 6
        
             
        
        
        
Answer:
yo soy inteligente 
Step-by-step explanation:
pero no me se la respuesta de la perunta