What is 2,500 written in scientific notation?

How can you find the conditional probability of a given b as the fraction of b’s outcomes that also belong to a, and interpret the answer in terms of the model? i just need a good explanation

Line l passes through points (0,4) and (3,6) what is the slope of a line that is parallel to line l -2/3 -3/2 2/3 3/2

Write an expression that has three terms and simplifies to 4x - 7. identify the coefficient(s) and constant(s) in your expression