Final answer:
The correct equation for the expression 0.6 × 0.9 is A. 0.6 × 0.9 = 0.54. This product correctly reflects the multiplication of two decimal numbers with one decimal place each, resulting in a product with two decimal places.
Step-by-step explanation:
The equation that shows a correct strategy and product for the expression 0.6 × 0.9 is A. 0.6 × 0.9 = 0.54. Answer B is also technically correct since 0.540 is the same as 0.54 with an extra decimal place, but usually, the additional zero is not necessary unless we are considering significant figures. Answer C and Answer D are incorrect because they misplace the decimal point, resulting in a number that is much larger than the actual product.
When multiplying decimal numbers, it's important to count the total number of decimal places in both factors and ensure that the product has the same number of decimal places. In this case, 0.6 (one decimal place) multiplied by 0.9 (one decimal place) will result in a product with two decimal places: 0.54.