Given right triangle ABCABC with altitude \overline{BD} BD
drawn to hypotenuse ACAC. If AB=4AB=4 and AD=1,AD=1, what is the length of \overline{AC}?
AC
? (Note: the figure is not drawn to scale.)

Several paint mixtures are made by mixing blue paint and white paint. paint colors blue paint white paint mixture a 5 cups 12 cups mixture b 6 cups 6 cups mixture c 4 cups 12 cups mixture d 5 cups 6 cups which mixture has the highest ratio of blue paint to white paint