Final answer:
To evaluate the expression 300m + 240,000 when m = 21, we multiply 300 by 21 and add 240,000 to obtain the final result of 246,300.
Step-by-step explanation:
To evaluate the expression 300m + 240,000 when m = 21, we need to substitute 21 for m and then perform the arithmetic operation. First, multiply 300 by 21 to get 6,300. Next, add this result to 240,000 to obtain the final answer.
Performing the calculation step-by-step:
1. 300m becomes 300 × 21, which equals 6,300.
2. The expression now is 6,300 + 240,000.
3. Add 6,300 to 240,000 to get 246,300.
Therefore, the evaluated expression is 246,300.