Final answer:
Multiplying monomials and polynomials is useful in real-world problems involving quantities, measurements, and calculations.
Step-by-step explanation:
Multiplying monomials and polynomials can appear in real-world problems in various ways. For example, if you are calculating the total cost of buying multiple items with different prices (represented by monomials), you can multiply the price of each item by the quantity to find the total cost.
If you are calculating the area of a rectangular field (represented by a polynomial), you can multiply the length and width to find the area.
In summary, multiplying monomials and polynomials is useful in real-world problems involving quantities, measurements, and calculations.