The volume of a cylinder is given by
Where 
is the base area and h is the height.
So, if we call 
the volumes with the original and the doubled area, we have
Since the height was doubled. We deduce that
So, if the height is doubled, the volume will double as well.
Answer:
until the 4th visit, GWS has the better cost but after the 4th visit the cost for Mega is higher
Step-by-step explanation:
Answer: 3x+7=a
a+X=63 a=63-x
Substitute into first formula
3x+7=63-x
4x=56
X=
26/2
X=13
A=50
Plug-in answers to check my work
50=3*13+7 46 not equal to 50
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Step-by-step explanation:
