Answer: 
Step-by-step explanation:
If we draw RP and PS, then in the quadrilateral formed, we know that
, and since angles in a quadrilateral add to 360 degrees, this means
.
Thus, arc RS also measures 126 degrees
Answer:
2600mg
Step-by-step explanation:
0.13*20=2.6g
2.6g=2600mg
3 less then x.......x - 3
is equal to 13...= 13
x - 3 = 13 <==
I believe the answer is C -4
Edit . . . I might have been wrong haha thinking backwards
Sedimentary rocks for the first one I think