What is 8,690,000 rounded to the nearest tenth

Cindy uses 1-inch cubes to find the volume of a jewelry box shaped like a rectangular prism. she uses 780 cubes to completely fill the jewelry box with no gaps or overlaps. if the jewelry box is 13 inches long and 5 inches wide, how tall is cindy’s jewelry box?

Which ratio is equivalent to 10: 85

What are the vertical asymptotes of the function f(x) =5x+5/x2 + x-2