What is the name for the imaginary line that runs east to west at 0 degrees on a map or a globe?

:calculate the sum of the interior angles of a 13-sided polygon.

Astudent conducts an experiment to see how music affects plant growth. the student obtains four identical plants. each one is potted in the same type of soil and receives the same amount of sunlight and water each day. plant a listens to classical music for three hours each day. plant b listens to rock music for three hours each day. plant c listens to country music for three hours each day. plant d does not listen to any music at all. 2. based on the experiment in the scenario, which visual aid would be most in showing the change in the plants' heights over time? a. a pie chart b. a line graph c. a timeline d. a bar graph

Find the equation of the line passing through the point (–1, 5) and perpendicular to the line 3x + y = 4.