A square is rotated about its center. Select all of the angles of rotation that will map the square onto itself.
45 degrees
60 degrees
90 degrees
120 degrees
180 degrees
270 degrees
THIS IS A MULTIPLE CHOICE

Solve the problem. a student earned grades of c, a, b, and a in four different courses. those courses had these corresponding numbers of credit hours: 4, 5, 1, and 5. the grading system assigns quality points to letter grades as follows: a = 4, b = 3, c = 2, d = 1, and f = 0. compute the grade point average (gpa) and round the result to two decimal places. 3.40 3.50 8.75 2.18

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

Jordan got 27 out of 90 correct on his test . what fraction of the marks did her get correct