|
Author Question: Find the envelope of the family of straight lines xcosh(c)+ysinh(c) = 3. (Read 29 times) |
A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
Elderly adults are at greatest risk of stroke and myocardial infarction and have the most to gain from prophylaxis. Patients ages 60 to 80 years with blood pressures above 160/90 mm Hg should benefit from antihypertensive treatment.
Alcohol acts as a diuretic. Eight ounces of water is needed to metabolize just 1 ounce of alcohol.
About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.