You first put the numbers that relate so it will be -3 times 2 and 10 to the power of 4 times 10 to the power of -3, -3 times 2 equal -6 and 10^4 times 10^-3 equal 10 to the power of 1.
2/5 will be shaded in the original how I got it s that you make a rectangle and make fifths inside and shade in 3/5 of that and see what matches up on the top.