Answer:

Step-by-step explanation:

257,650 rounded to the nearest hundred is 257,700 because it is right at the border (50) we have to round up.
Answer:
1st class - 22 people
coach - 57 people
Step-by-step explanation:
$85 x 22 people = $1870
$60 x 57 people = $3420
22 people + 57 people = 79 people
$1870 + $3420 = $5290
50-10 = 40. 40 divided by 6 = around 6/7. So about 6/7 weeks