Answer:
Step-by-step explanation:
<u>Carlos made:</u>
<u>Lily made:</u>
<u>Together they made:</u>
- 12C + 35 + 12L = 12(C + L) + 35
Lily is right. We don't know what 120 means in Carlos's equation, he should put 12L for Lily.
Integrating gives
To compute the integral, substitute , so that . Then
Since for all , we can drop the absolute value, so we end up with
Given that , we have
so that