4.0003*10^7 in scientific notation

Use set builder notation to represent the following set: { -3, -2, -1, 0}

3women sell hats at a craft fair weekly. the money they make at the fair is split into categories. 9% goes to pay taxes. $55 goes to pay rent for the space they sell in. the rest is split between the women. if the group make $706 at the fair, how much does each women get paid once the money is divided

Which shows the first equation written in slope-intercept form? 1/2 (2y + 10) = 7x