Step-by-step explanation:
$ 900 is the answer. as i shown in the attachment
Okay, so a kilometer=1000 meters, knowing that we can multiply 350*300 for the area, which would give us 105000 meters squared, then we divide 105000 by 1000, giving us 105 square kilometers.
<u>Number + 5 = 10</u>
Subtract 5 from each side:<em> Number = 5</em>