which pair of rectangles is similar?
a. 1 rectangle is 3 and 8 2 rectangle is 2 and 6
b. 1 rectangle is 3 and 6 2 rectangle is 2 and 9
c. 1 rectangle is 3 and 8 2 rectangle is 2 and 5
d. 1 rectangle is 3 and 9 2 rectangle is 2 and 6

Could somebody me with this radical simplification?

What is the area of the original rectangle? 8 cm² 20 cm² 25 cm² 40 cm²

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?