How many cases of hiv/aids infection exist in the world today?
a.
1.5 million
b.
25 million
c.
33 million
d.
42 million

Write a paragraph about why the respiratory system is important and we need to breathe easily. (guys i really need ) x(

*edit* i took the test and i picked a and it was incorrect for its c! rank the following suggestions for preventing std, in order of increasing effectiveness. 1) using latex condoms properly 2) using spermicidal foam or jelly with a monogamous partner 3) abstaining from sexual intercourse and genital contact a. 1, 2, 3c. 2, 1, 3

We can be sure that a mole of table sugar and a mole of vitamin c are equal in their