To express the number 385,500 hours using exponential notation with a specific number of significant figures, you can use the following steps:
a. One significant figure:
- Expressing 385,500 as 3.9 × 10^5 hours (rounded to one significant figure).
b. Two significant figures:
- Expressing 385,500 as 3.9 × 10^5 hours (rounded to two significant figures).
c. Three significant figures:
- Expressing 385,500 as 3.86 × 10^5 hours (rounded to three significant figures).
d. Five significant figures:
- Expressing 385,500 as 3.8550 × 10^5 hours (rounded to five significant figures).
Keep in mind that the exponential notation represents the same value but with the specified number of significant figures.