Answer:
Step-by-step explanation:
a
The circumference (C) of a circle is calculated as
C = 2πr ( r is the radius ) , then
C = 2π × 20 = 40π
Answer: y=1/2 of the whole
k = -10
-9 + k/10 = -10
-10/10 = -1
-9 + -1 = -10
what work