## anonymous 3 years ago I need help with this... I marked what I think the answers are, I will attach the document in the comments. Thanks in advance!!

1. anonymous

2. anonymous

Btw this is not a test, its a practice and I didnt post the whole thing... only the ones that I dont understand or second guess myself on

3. anonymous

The first one. S = 3*r^4*t Divide both sides by 3 S/3 = r^4 * t Now divide by r^4 $\frac{ S }{ 3 r^{4} }$ You're absolutely correct!

4. anonymous

Thank youi very much... I alsway second guess myself:\ Do you know about any of the other problems?

5. ajprincess

As for the second one it should be $$k\le-3$$ $$9+3k\le0$$ $$3k\le-9$$ $$k\le-3$$