 Okay. So expressing the following in decimal notation, so just take these out of scientific notation back to decimal notation. So we got to the fourth here, so that's going to be a number bigger than one, okay? So we're going to be moving this decimal place to the right, okay? So we're going to move it to the right four times, so one, two, three, and then a zero. So we've got an equal one, zero, four, nine, zero. And this zero is going to be non-significant, okay? And that's why it's not in the scientific notation. So to the three, we're going to move, take this, so it's going to be bigger than one. We're going to take this and move it three places, one, two, three. So we're going to have a zero there and a zero there, which are going to be non-significant zeroes. So seven, eight, zero, zero. This one is going to be two, so one, two is going to have one non-significant zero. Ironically, none of these have a decimal. And we're going to take this one, 15. So, what's it say? One, two, three, and then we'll do all the other zeroes here. So three, eight, nine, so three, four, five, six, seven, eight, nine, ten, eleven, twelve, thirteen, fourteen, fifteen. Okay? So notice none of those have a decimal point at the end indicating these last zeroes are all non-significant. Okay? And that's indicated, of course, in the original scientific notation.