1. The problem is to round the number 7481 to 1 significant figure. 2. The rule for rounding to significant figures is to keep only the first non-zero digit and replace the rest with zeros, adjusting the first digit if the next digit is 5 or more. 3. The first significant figure in 7481 is 7 (thousands place). 4. Look at the next digit, which is 4 (hundreds place). Since 4 is less than 5, we do not round up. 5. Replace all digits after the first significant figure with zeros. 6. Therefore, 7481 rounded to 1 significant figure is 7000.