Final answer:
The expanded form of 894,217 is 800,000 + 90,000 + 4,000 + 200 + 10 + 7, and its number name is 'eight hundred ninety-four thousand, two hundred seventeen'. Its scientific notation is 8.94217 x 10^5.
Step-by-step explanation:
Writing the number 894,217 in expanded form means breaking down the number according to the value of each digit. It translates to:
800,000 + 90,000 + 4,000 + 200 + 10 + 7
In terms of number names, 894,217 is said as 'eight hundred ninety-four thousand, two hundred seventeen'.
When converting to scientific notation, we aim to express numbers in a way that places the decimal after the first non-zero digit, followed by a power of 10 that represents how many places the decimal has moved. For the number 894,217, the scientific notation format would be:
8.94217 x 105