How to write integral as riemann sum.

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

Which equation is equivalent to the given expression? -(1/2y+1/4) a. -1/4(1+2y) b. 1/4(2y-1) c. -2(1/4y-1/8) d. 2(1/8-1/4y)

Find the circumference of a pizza with a diameter of 10 inches round to the nearest tenth