Answer : 40,000
Explanation : when multiplying 10 with 4,000 we get
4000 X 10 = 40,000.
As we multiply, using the chart there are 4 thousand present in the row of thousand column. When we multiply that with 10 it gets shifted to left and becomes 40,000.
You just take the denominator of the fraction used to divided the one and there is your answer. does this help
Answer: 
Step-by-step explanation:
Rewrite it in the form
, where 

Use Square of Sum: 

Equation: y=-5x+100, where x is the number of hours and y is the battery percentage
The slope is -5, meaning she loses 5% of battery per hour
:)