Answer:
$125 you will end up w/ $5125
Step-by-step explanation:
Answer:
the answer would be D
Step-by-step explanation:
Differentiate the given solution:

Substitute
and
into the ODE:

and it's easy to see the left side indeed reduces to 0.
For complex number, the magnitude is pretty straight forward:
sqrt(6^2 + 2^2) = sqrt(40)
For any a + bi, the magnitude will be sqrt(a^2 + b^2)