In order to investigate the performance of grade 12 students in California on the SAT, ten high schools were randomly selected from all high schools in California. The performance of all students in these ten schools were placed in a sample.

Which is a true statement about an exterior angle of a triangle a. it is formed by two segments that are not sides of the triangle, b. it forms a linear pair with one of the interior angles of the triangle, c. it is complementary to one of the interior angles of the triangle. d. it is formed by two segments that are sides of the triangle.

Issof claims that the scale factor is 1/2. which statement about his claim is correct

Write 17/20 as a decimal and as a percent.