What are the roots of the equation 2x2 + 7x – 1 = 0?
- bzV6²-4ac
X =
2a

Find the sum of the following series. round to the nearest hundredth if necessary.

Brent wants to know what is 5 x 1/2

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