____ variables and constants are those that are known to an entire class.

Which of the following statements about arcs is false?

a. An arc is drawn as a part of an oval. b. Arcs sweep from a starting angle the number of degrees specified by their arc angle. c. Arcs that sweep clockwise are measured in positive degrees. d. None of the above statements are false.

The prefix ____ is used for representing a quintillion.

A. tera- B. exa- C. giga- D. peta-