Answer: A)There are 5 nonfiction books for every 9 fiction books in the library.
Step-by-step explanation: If you do the math you realize that there are clearly less nonfiction books than fiction books.
105/5=21 and after 21*9 lines up and to check your work than
5*21=105 and 9*21=189 it is not B because the smaller number 105 is in front of the ratio 105:189 and 5:9
Solution
cos (90-60)=cos (x+10)
⇒30=x+10
x=30-10
x=20.
The length would be 9 and the width would be 3
This is the answer: log_5(d^4 * k^12)
