25% is 1/4.
This means that 1/4 of the books in the library is 54, so just multiply 54 by 4, which gives you 100%, or all of the books. 54 times 4 is equal to 216, so there are 216 books in the library.
Answer:

Step-by-step explanation:
If we have a product function y, in the following format

This function has the following derivative

In this problem, we have that:

So

The derivative of the function is:




Answer:
= -3
Step-by-step explanation:
Answer:
40
Step-by-step explanation:
n/10+5=9
n/10=9-5
n/10=4
n=4*10
n=40
Ok thank you I think you answered in the wrong place