I dont understand this please help i will give brainliest

At school there are 526 students and 263 are girls about how likely is it that a randomly chosen student will be a boy

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

Based on the diagram, match the trigonometric ratios with the corresponding ratios of the sides of the triangle. tiles : cosb sinb tanb sincposs matches: c/b b/a b/c c/a