Witch place-value would you you use to compare the numbers 645,853 646,348

Idont get this question can someone me solve it? ** the distance light travels in one second (1 light second) is about 1.86 ×10^5 mi. saturn is about 475 light-seconds from the sun. about how many miles from the sun is saturn..my guess is 8.83* 10^7 you so much

What expression is equivalent to log3(x+4)

The dash figure is a dilation if the original figure. find the scale factor. classify the dilation as an enlargement or a reduction