A family plans to surround their pool with a patio of constant width. The dimensions of the pool with the patio will be 15 feet by 20 feet. Write and simplify a polynomial to express the area of the pool.

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