How to compare the values of the underlined digits. 6,300 and 530 with the 3 been underlined

How many square feet of out door carpet will we need for this hole? 8ft 3ft 12ft 4ft

Noel is hoping to make a profit (in $) on the school play and has determined the function describing the profit to be f(t) = 8t – 2654, where t is the number of tickets sold. what does the number 8 tell you?

Afurniture store is having a weekend sale and is offering a 20% discount on patio chairs and tables the sales tax on furniture is 6.25%