
<u>if </u><u>we </u><u>ever </u><u>face </u><u>a </u><u>number </u><u>written </u><u>in </u><u>the </u><u>form </u><u>of </u>
<u>where </u><u>x </u><u>denotes </u><u>the </u><u>base </u><u>and </u><u>n </u><u>denotes </u><u>the </u><u>exponent</u><u> </u><u>or </u><u>power </u><u>,</u><u> </u><u>we </u><u>can </u><u>expand </u><u>it </u><u>in </u><u>the </u><u>following</u><u> </u><u>way </u><u>-</u>

therefore ,

option ( B )
hope helpful -,-
Answer:
it appears to have TRANSLATED
3,989.237
A thousandth = 1/1000 = 0.001
Round 4th decimal place = 5
5 and over is rounding up and under 5 rounds down so it would be 3,989.237