Answer:
The time of working together is x
So
1/x=1/4+1/6.5
x = 2.48
So the time of working together is 2.48 hrs
Step-by-step explanation:
Answer:
3rd box
Step-by-step explanation:
A logarithmic function without a subscript means that it must be log base 10.

When learning about logarithms, a textbook/teacher provides their students with the following general equations


Hopefully you are familiar with this. Using the equations that I just showed, we can change the equation
to 
This would make answer choice C correct.
Container A:
y=-6x+800
800 is y intercept( it already have 800 before leaking)
leaking means that its went down so it had to be negative -6x)
container B:
y=-10x+1000
same thing with a container B
-6x+800=-10x+1000 = 800-6x=1000-10x