Question

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

Answer 1

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

Answer 2

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!

Answer 3

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

Answer 4

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