15b is the answer to this question hope this was helpful
Answer:
Step-by-step explanation:
a. no. 9 x 15 = 135, so if she sells more than 15 necklaces, she'll make a profit
b. 50n > 135 + 4.50n
Answer:

Step-by-step explanation:
1) The Fundamental Theorem of Calculus in its first part, shows us a reciprocal relationship between Derivatives and Integration

2) In this case, we'll need to find the derivative applying the chain rule. As it follows:

3) To test it, just integrate:

One of the would be getting 6 biscuits and the other would be getting 3.<span />