Arectangle has the lenth of 10 and with of 4 . if both dimensins r doubled what does it affect the perimeter

Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?

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]

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16