Please see attached pic
2 answers:
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I've attached a plot of one such cross-section (orange) over the region in the x-y plane (blue), including the bounding curves (red). (I've set 
for this example.)
The length of each cross section (the side lying in the base) has length determined by the horizontal distance
between the y-axis 
and the curve 
. In terms of 
, this distance is 
. The height of each cross section is twice the value of , so the area of each rectangular cross section should be 
.
This means the volume would be given by the integral
The length of each cross section (the side lying in the base) has length determined by the horizontal distance
This means the volume would be given by the integral
Answer:
x= -4
x= 4
Step-by-step explanation:
This is a quadratic equation, and can be solved very quickly since it only has two terms, the square one and the free term.
Hence the solutions is obtained following the steps from below:
x2-16=0
Lets sum to both side 16
x2-16=0+16
x2=16
Now, lets apply square root to whole equation:
The bars means that x can be-4 o 4, since -4^2=16 and 4^2=16