The smaller the wire, the larger the number

A person exposed to the AIDS virus will take up to6months to show antibodies in the blood serum and 2 to
5 years to show externally observable symptoms.

This problem does not have to be computed, because the two symbols cancel each other. The radical sign (\ ) in (\ 13):tells you to find the square root of 13. But the exponent (2) tells you to square the answer--that is, to multiply the square root of 13 by itself. This would get you back to 13.

By rotating clockwise. Pulley C will cause Pulley B to rotate counterclockwise, which will in turn cause Pulley A to rotate clockwise.