Eric is hanging a rectangle mirror that has a diagonal of 47 inches with an angle of depression of 60°. how many square inches is the mirror? (round to nearest tenth) a) 956.5 in2 b) 1,104.5 in2 c) 1,365.5 in2 d) 1795.5 in2

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