Final answer:
To estimate the average by rounding to the nearest 1,000, ignore the 0s, compute the average, and then append three 0s to the result.
Step-by-step explanation:
To estimate the average by first rounding to the nearest 1,000, we can ignore the 0s in the rounded values and compute the average. Let's round the given numbers to the nearest 1,000:
2,900 rounds to 3,000
4,000 rounds to 4,000
4,500 rounds to 5,000
Now, we can calculate the average of the rounded values: (3,000 + 4,000 + 5,000) / 3 = 12,000 / 3 = 4,000
Finally, we can append the three 0s back to the average to get the final estimated average: 4,000 + 3 zeros = 4,000,000