Answer:
the think the answer is b.
Step-by-step explanation:
Answer:


Step-by-step explanation:
<h3>
a. </h3>

<h3>b.</h3>

<span>2.1e-10
= 2.1 x 10^-10
= 0.00000000021
hope it helps</span>
Answer:
i believe the answer is a. There are no solutions to the system because the equations represent parallel lines.
Step-by-step explanation:
Answer:
25.13
Step-by-step explanation:
C=2πr=2·π·4≈25.13274cm