Final answer:
The correct answer is 10.5m² + 6.3m.
The simplified form of the expression 3.5m(3m + 1.8) is 10.5m² + 6.3m, after using the distributive property to multiply 3.5m by each term inside the parentheses.
Step-by-step explanation:
To simplify the expression 3.5m(3m + 1.8) using the distributive property, you multiply 3.5m by each term inside the parentheses.
First, multiply 3.5m by 3m:
3.5m * 3m = 10.5m²
Next, multiply 3.5m by 1.8:
3.5m * 1.8 = 6.3m
Now, combine these two products:
10.5m² + 6.3m
This is the simplified version of the original expression.