Marisa needs 1.4 hours to comeplete 7 homework problems. how long does each problem take? a: 0.1 hours b: 0.2 hours c: 0.7 hours or d: 1 hour?

Keisha makes a large sandwich for a family picnic she takes 1/2 of them the sandwich to the picnic her family eats 3/8 of the whole sandwich what fraction of the whole sandwich does keisha bring back from the picnic

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 multiplys to be 1 but adds up to be 4