What is the sum of 2.5 × 104 and 3.4 × 104

What is the measure of angle tvu shown in the diagram below

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.

2. explain in words how you plot the point (4, −2) in a rectangular coordinate system.