3 significant figures..the zeros are non-significant
we know that
The measurement of <u>the external angle</u> is the semi-difference of the arcs it includes.
In this problem
![21\°=\frac{1}{2}[arc\ RU-arc\ SU]](https://tex.z-dn.net/?f=21%5C%C2%B0%3D%5Cfrac%7B1%7D%7B2%7D%5Barc%5C%20RU-arc%5C%20SU%5D)
Solve for the measure of arc SU
![42\°=[arc\ RU-arc\ SU]](https://tex.z-dn.net/?f=42%5C%C2%B0%3D%5Barc%5C%20RU-arc%5C%20SU%5D)


therefore
the answer is
The measure of the arc SU is 
Answer:
c
Step-by-step explanation:
the graph has no side value, therefore the answer is 0
Answer:
- x ≥ -3
- x ≥ -3
Step-by-step explanation:
-15x + 60 ≤ 105
-15x ≤ 45
x ≥ -3
14x + 11 ≤ -31
14x ≤ -42
x ≥ -3
Best of Luck!