Idon't get problems 1-4 i have the answers but they don't make sense to me

#1. there r 3 girls and they spent 2.55 each basically it is 2.55 + 2.55 + 2.55 or 2.55 x 3

#2 the problem is cut off

#3. 7 does not go into 40 but 7 x 6 is 42 and that is more than forty so its ok

#4 the problem is cut off

1 and 3 are right but I can't see 2&4

The surface area would be 576 because you multiply all the numbers then multiply that number by 6