If the population of the United States is 2.8 x 10^8 and each person spends about $150 per year going to the movies (or renting movies), express the total annual spending on movies in scientific notation.

4.2 x 10^10

Step-by-step explanation:

2.8 x 10^8 x 1.5 x 10^2 = 4.2 x 10^10

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w