Answer: 56
Step-by-step explanation:
We are given that ,
The diameter of each U.S. penny = \(\dfrac{3}{4}\) inch.
The length of the row of pennies = 42 inches
Then , the number of pennies in that row will be :
\(=\text{Length of row}\div\text{Diameter of each penny}\\\\=42\div\dfrac{3}{4}\\\\=42\times\dfrac{4}{3}\ \ \text{[Flip divisor fraction, multiply the original number by its reciprocal.]}\\\\=56\)
Hence, the required number of pennies. = 56
