Final answer:
The difference in revenue between the company with the greatest revenue (Company D: $67,900,000) and the one with the least revenue (Company C: $90,000) is $67,810,000, which converts to 6.79 × 10⁷. The correct answer is D. 6.79 × 10⁷.
Step-by-step explanation:
The student is asking to find the difference in revenue between the company with the greatest revenue and the company with the least revenue. To do this, we need to compare the revenues of all companies and identify the largest and smallest values. Now let's turn these scientific notations into regular numbers so it's easier to compare:
- Company A: 1.9 × 10⁶ = $1,900,000
- Company B: 2.7 × 10⁵ = $270,000
- Company C: 9.0 × 10⁴ = $90,000
- Company D: 6.79 × 10⁷ = $67,900,000
It's clear that Company D has the highest revenue and Company C has the least. Now to find the difference between the greatest and least revenue:
67,900,000 - 90,000 = $67,810,000
Converting this back to scientific notation:
$67,810,000 = 6.781 × 10⁷
The difference in scientific notation is 6.781 × 10⁷, but we should round it to three significant figures to match the options provided:
6.781 × 10⁷ rounds to 6.79 × 10⁷
Therefore, the correct answer is D. 6.79 × 10⁷.