Is 1.27 a irrational number or rational number

Select the conic section that represents the equation. 3x2 + 3y2 -2x + 4 = 0

Percent increase and decrease. original number: 45 new number: 18

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