About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
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Illicit drug use costs the United States approximately $181 billion every year.
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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
A color-coded record.
How to plot a cosine function containing an amplitude and phase-shift (Question 2 of 2)
How to solve optimization problems in calculus (Question 7)