What is the scale factor? it has to be a fraction and whats the length size of m?

Step-by-step explanation:
Scale factor : A scale factor is a number which multiplies of some quantity.
Given that [tex]\triangle RST[/tex]≅ [tex]\triangle MNO[/tex]
SSS rule : If three sides of a triangle are congruent to the sides of another triangle. Then two triangle are congruent .
Since [tex]\triangle RST[/tex] and [tex]\triangle MNO[/tex] congruent.
Then,
[tex]\frac{RS}{MN} =\frac{ST}{NO} =\frac{RT}{MO}[/tex]
Taking first two ratio
[tex]\frac{RS}{MN} =\frac{ST}{NO}[/tex]
⇔[tex]\frac{3}{6} =\frac{5.5}{x}[/tex] [ RS = 3 , ST= 5.5, MN= 6 and NO=x]
⇔3x =6×5.5
⇔[tex]x =\frac{5.5 \times 6}{3}[/tex]
⇔x =11