The measure of ab is 126. what is the measure of

Ben bowled 124 and 188 in his first two games. what must he bowl in his third game to have an average of at least 160?

The ksp expression for the system pbcl2(s) pb+2(aq) + 2 cl-(aq) is: [pbc12][pb+2][2cl-] [pb+2][cl-]2 [pb+2][2cl-]2 [pbcl2][pb+2][cl-]2 [pb+2][2cl-]2[pbcl2]

What is the number 321,000,000 in scientific notation? also what is the number? ?