Final answer:
The result of the estimated calculation 23.4 × 13.9 divided by 0.18, when each number is rounded to 1 significant figure, is approximately 1000.
Step-by-step explanation:
To estimate the result of 23.4 × 13.9 divided by 0.18 by rounding each number to 1 significant figure, we should first round each of these numbers. When we round 23.4 and 13.9 to 1 significant figure, we get 20 and 10, respectively, and when we round 0.18 to 1 significant figure, we get 0.2.
Next, we perform the calculation with these rounded values:
200 / 0.2 = 1000
So, an estimate of our original calculation, rounded to 1 significant figure, would be 1000.