Help me answer it pelase

Find the balance at the end of 4 years if 1000 is deposited at the rate of

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?

Use pascal's triangle to find the missing values. x4 - 4xb + 6x2 - ax + 1