Answer:
1a. 390000
1b. 191000
2. 247000
Step-by-step explanation:
for 1a, the place value of 8 is tens of thousand.
so rounding 389422 to the nearest ten thousand gives you 390000
since the 9 is >5 we add 1 to the prefix of that 9 which is 8 making it 8+1=9 and adding the rest zeros to it.
same applies to the rest.
