Choose the best answer for this length.
the length of a paintbrush
9 inches
9 yards
9 feet

4+6x-3x^3 in standard form with explanations because i don’t understand

What is the volume of this square pyramid?

Given the box plot, will the mean or the median provide a better description of the center? box plot with min at 10.5, q1 at 11.5, median at 12.5, q3 at 13.5, max at 15