Guys this is easy i think but please help

What aspects of lines have to be diffrent

Afurniture store has 1,500 chairs in storage. a manager uses three delivery receipts to simulate samples to check 100 chairs and note the number of brown chairs. suppose the actual number of brown chairs is 1,080. about how many brown chairs are

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?