Answer:
86 books
Step-by-step explanation:
A stack of books is 43 inches tall.
Each book is [tex]\frac{1}{2}[/tex] inch thick.
To find the number of books in tha stack, divide the height of the stack by the height of the book:
[tex]43:\dfrac{1}{2}[/tex]
The division by the fraction [tex]\frac{1}{2}[/tex] is equivalent to the multiplication by the fraction [tex]\frac{2}{1},[/tex] so
[tex]43:\dfrac{1}{2}=43\cdot \dfrac{2}{1}=43\cdot 2=86[/tex]
