74,312 is already rounded to the first digit (ones).
300
In the number 287, the digit 2 is in the tens place. This means that the value of the digit 2 is 20, as it represents 20 tens. In the number 287, the digit 2 contributes to the overall value of 20.
5.5296
23.1
0
290
27.60 rounded to one decimal place is 27.6. The first digit to the right of the . is the tenth.
82.58% (rounded to nearest hundredth).
300
300
The 42nd digit of pi is 6. (The first 43 digits of pi are 3.141592653589793238462643383279502884197169. If pi were rounded to the nearest 42 digits, then the 6 would be rounded up to a seven.)