Which is equivalent to 450b^9 after it has been simplified completely

The floor plan of a room has a scale of 2.5 in.: 35 ft. in the drawing, the length of the room is 8 in. and the width of the room is 6 in. what is the perimeter of the actual room?

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. 4x^2 + 20x + 25 = 0