Which expression is equivalent to

60 2(x + 2) in the diagram, gef and hef are congruent. what is the value of x?

What is the measure of sty in oo below? 130 310 230 50

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