In scientific notation is 14,200 000 becomes 1.42 x10'5

You are correct with the 1.42 but wrong with the 10^5
Count the digits after the 1, which is 7. So it should be
1.42 x 10^7

Turning a fraction into a decimal:When turning a fraction in to a decimal, you divide. For example, when you turn 3/5 in to a decimal, you would have to do 3 divided by 5, which is 0.6.Turning a decimal in to a fraction:When turning a decimal into a fraction, you put the number over a hundred. For example, if you have .15, it would be 3/20 because you (15/100) divide both numbers by the same number which is 5.