Suppose we have a square with vertices at $0,$ $-6 13i,$ $-19 7i,$ and $-13-6i.$ Suppose that we want to multiply these points by a single complex number $a bi$ to get a square with vertices $0,$ $8 2i,$ $6 10i,$ and $-2 8i.$ What is $(a, b)

Suppose a laboratory has a 30 g sample of polonium-210. the half-life of polonium-210 is about 138 days how many half-lives of polonium-210 occur in 1104 days? how much polonium is in the sample 1104 days later? 9; 0.06 g 8; 0.12 g 8; 2,070 g