What is the imaginary part of the complex number plotted on this graph?

Fanny mendelssohn manages all the magazines and paperback books at a local grocery store. she prices many paperbacks to sell at $7.99. the cost to the store is $5.29. what is the markup rate on a paperback book, based on its cost?

Is the square root of 4 plus the square root of 16 rational?

Which statement accurately describes how to perform a 90° clockwise rotation of point a (1,4) around the origin?