Is -4.5 greater than -2.375?

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

For problems 29 - 31 the graph of a quadratic function y=ax^2 + bx + c is shown. tell whether the discriminant of ax^2 + bx + c = 0 is positive, negative, or zero.

The vertices of a triangle are a(7.5), b(4,2), and c19. 2). what is