Match the functions with their periods.
y=-3tan3x
y=6sin3x
y=-4cot x/4
y=-2cos 2x/3
y=-2/3 sec x/5
3pi, 2x/3, pi/3, 10pi

The sat and act tests use very different grading scales. the sat math scores follow a normal distribution with mean 518 and standard deviation of 118. the act math scores follow a normal distribution with mean 20.7 and standard deviation of 5. suppose regan scores a 754 on the math portion of the sat. how much would her sister veronica need to score on the math portion of the act to meet or beat regan's score?