The sum of interior angles of a regular polygon is 1980 degrees. how many sides does the polygon have?

This is the number of parts out of 100, the numerator of a fraction where the denominator is 100. submit

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?

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.