Fie ABCDA'B'C'D' o prisma patrulatera regulata cu AB= 4 radical din 2, iar O este centrul bazei ABCD. Stiind ca A'O= 5 cm, calculati: a) lungimea inaltimii prismei; b)aria sectiunii diagonale a prismei. VA ROG REPEDE.

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