Final answer:
To round the given numbers to the specified digit, we use the rules for rounding numbers.
Step-by-step explanation:
To round the numbers to the given digit:
a. 7163 to the nearest hundreds: The hundreds digit in 7163 is 6. The digit to the right of it is 1, which is less than 5. Therefore, we round down and the answer is 7100.
b. 3342 to the nearest thousands: The thousands digit in 3342 is 3. The digit to the right of it is 4, which is greater than 5. Therefore, we round up and the answer is 4000.
c. 9819 to the nearest tens: The tens digit in 9819 is 1. The digit to the right of it is 9, which is greater than 5. Therefore, we round up and the answer is 9820.
d. none: There is no given digit to round to in this case.