The stiffness of a beam of rectangular cross section is proportional to the product xy3. Find the stiffest beam which can be cut from a log with diameter d = 14 inches. See figure on right. 
Definitions:
Intellectual Disability
A term used to describe a range of developmental conditions characterized by limitations in intellectual functioning and adaptive behavior.
Sickle-cell Gene
A hereditary gene that causes red blood cells to become misshapen and sickle-shaped, leading to various health complications.
Malaria
A life-threatening disease transmitted through the bite of an infected Anopheles mosquito, caused by Plasmodium parasites.
Birthweight
The weight of a baby immediately after birth, considered an important indicator of neonatal health and development.
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