The center of mass of quarter circle given by y=sqrt(r2−x2) ,x ∈ [0,r] is the point P=( , )
Hint: Use symmetry.

Sam makes his sales calls according to a pattern. he travels either north or south depending on the calendar. some of his past trips were as follows: on february 17, april 24, june 10, september 19, and november 3 he drove north. on february 28, may 25, august 22, november 20, and december 18, he drove south. describe sams' pattern. in which direction will sam drive on oct4 and oct 24?

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

21 a stick 7 inches long is broken into two pieces, so that one piece is twice as long as the other one. how long are the two pieces?