Explain whether 0.9 x 10^-5 is written in scientific notation. If not, write the number correctly in scientific notation. Please help me

Which formula finds the probability that a point on the grid below will be in the blue area? p(blue) = total number of squares number of blue squares number of blue squares p(blue) = total number of squares number of blue squares p(blue) = number of white squares

Will gve pints stars and brainliest

Billy plotted −3 4 and −1 4 on a number line to determine that −3 4 is smaller than −1 4 .is he correct? explain why or why not