Help me plss only with numbers from 1 to 9

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

Ms.ortiz sells tomatoes wholesale. the function p(x)=-80x^2+320x-10, graphed below, indicates how much profit she makes on a load of tomatoes if she makes on a load of tomatoes if she sells them for 4-x dollars per kilogram. what should ms.ortiz charge per kilogram of tomatoes to make on a load of tomatoes?