Answer:
-8
Step-by-step explanation:
-21-(-13)
=-21+13
=-8 is the answer......
Answer:
Step-by-step explanation:yes
Answer:360/90 = 4
Total area = 4 times that of the sector.
Step-by-step explanation:
A 90 deg sector has 1/4 the area of the circle.
Total circle area = 4*9pi = 36pi