Pls quickly

a contractor records the areas, in square feet, of a small sample of houses in a neighborhood to determine data about the neighborhood.

they are:
2,400; 1,750; 1,900; 2,500; 2,250; 2,100

which of the following represents the numerator in the calculation of variance and standard deviation?

(225)2 + (–425)2 + (–275)2 + (325)2 + (75)2 + (–75)2 = 423,750
(650)2 + (–150)2 + (–600)2 + (250)2 + (150)2 + (–300)2 = 980,000
(250)2 + (–400)2 + (–250)2 + (350)2 + (100)2 + (–50)2 = 420,000

Paula makes stained-glass windows and sells them to boutique stores. if her costs total $12,000 per year plus $4 per window for the frame. how many windows must she produce to earn a profit of at least $48,000 in one year if she sells the windows for $28 each? 1. define a variable for the situation. 2. write an inequality that represents her profit. note: revenue is money coming in. cost is money going out. profit is the difference between the revenue and the cost. in other words: revenue - costs profit 3.using words, describe how many windows she must sell to have a profit of at least $48,000.