Answer:
x=14
Step-by-step explanation:
Cylinder is 10 meters wide, so its diameter is 10 meters. You get radius of it by dividing 10 by 2, which equals 5.
As you count volume of cylinder from that equation
You get an equation to count height:
h≈3.82 meters
Answer:
the length is
and the width is 
Step-by-step explanation:
Let points A and B be placed on the x-axis. Their coordinates are
and
(because of parabola symmetry). Two other vertices lie on the parabola, then
and
The length of the side AB is
and the length of the side AD is
Thus, the area of the rectangle ABCD is

Find the derivative A':

Equate A' to 0:

The maximum area of the rectangle is

The dimensions of the rectangle are:
the length is
and the width is