A) Kara's fee for the second child is $5
Draw a number line with 10 positives and 10 negatives. Count from 0 to 8. Now, from 8, count back 12 spots. From that spot, go back to 0, which is their original position. The number you counted there is your answer.
A18
18 is the exponent, am not sure because I see this topic a really long time ago, but I think that you multiply the exponent because the sign is multiplication
You can rewrite your function as

This implies that

Now, we have
, so it counts as a solution.
On the other hand, depending on the coefficient a, b and c, the cubic equation

can have either one or three solutions.
So, we have the solution x=0, and then one or three solutions coming from the cubic part. The equation as a whole thus have either two or four solutions, depending on the coefficients.
Answer:
1000
Step-by-step explanation:
3,450/3.45=1000