Siobhan rounds 99,498 to the nearest thousand and gets 100,00

Eileen purchased 3.4 pounds of apples at the total cost of $19.72. if she purchases 6.2 pounds of apples at this store, how much would it cost?

Jorge wants to determine the enlarged dimensions of a digital photo to be used as wallpaper on his computer screen. the original photo was 800 pixels wide by 600 pixels high. the new photo will be 1,260 pixels wide. what will the new height be?

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me