We can't see any given circle. The general form for a circle centered at the origin with radius r is

You can evaluate / find
<span>8.64 x 10^6
-----------------
4.32 x 10^3
by first dividing 8.64 by 4.32 and then dividing 10^6 by 10^3:
2*10^3 (answer)
Please choose the question you want help with next, and post it separately.
</span>
Answer:
f(12) = - 20
Step-by-step explanation:
To evaluate f(12), substitute x = 12 into f(x), that is
f(12) = - 2(12) + 4 = - 24 + 4 = - 20

change the mixed numbers to improper fractions and multiply the numerators / denominators
10
= 
×
=
= 1110 