He will need 36 Marshmellows And 24 Gram Crackers to make 12 Smorse :)
If there are 45 beads, with a ratio of

Then,

Then if

Then

Therefore,

Meaning, there would be a ratio of 36 beads to 9 beads
24➗2.88=0.8
30➗0.8 = 3.75
So the answer is 3.75
There are no real roots for a negative number, so -81 has no real roots, if the number is 81 however, then the tow roots are 9
The answer would still be 3. Nothing changes