The radius of a circle is 4 centimeters. what is the length of a 45° arc?

When drawing a trend line for a series of data on a scatter plot, which of the following is true? a. there should be an equal number of data points on either side of the trend line. b. all the data points should lie on one side of the trend line. c. the trend line should not intersect any data point on the plot. d. the trend line must connect each data point on the plot.

Which one ? is the answer and how to find this answer

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?