Brown rice costs $2 per pound, and beans cost $1.60 per pound. Lin has $20 to spend on these items to make a large meal of beans
and rice for a potluck dinner. Let b be the number of pound of beans Lin buys and r be the number of pounds of rice she buys when she spends all her money on this meal. 
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Answer:
<h2>The height is 3.43 centimeters, approximately.</h2>Step-by-step explanation:
Notice that there are 16 pieces from the circle, which means each sector has an angle of
Where all sectors have equal area.
Now, the area of the whole circle is , if we use the formula of its area, we'll find the radius of the circle
Notice that each piece works as an isosceles triangle, because each side is the radius, that is, they have the same length. So far, we know the sides of the isosceles triangle and one internal angle.
To find the height of the one piece, we need to use trigonometric reasons, because the height divides a triangle in two equal right triangles.
Therefore, the height is 3.43 centimeters, approximately.