Write an expression for m∠ rst

3x – 9

6x – 18

1.5x – 4.5

6x – 9

this is duplicate version of the question i forgot to add a picture to it

Abcd is a square. what is the measure of angle bac

What’s the volume of the triangular prism?

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