- Grade 11 and 12 Mathematics (Moderator: geoffrey)
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Author Question: When calculating the mean, the symbol X represents the . a. score of a single subject b. size of ... (Read 83 times) |
- Grade 11 and 12 Mathematics (Moderator: geoffrey)
The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.
The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).