 Okay, so yeah, we'll try to express all the following of these in scientific notation. So remember in scientific notation, you want to take your decimal point and move it to right after the first significant digit, okay? So, and the scientific notation number will have the same number of significant digits as this number does, okay? So in this case, we've got three significant digits. So the scientific notation number is going to be 1.23 times 10 to the 1. So this one, first we've got three significant digits. We've got the other one, two. And it's going to be 5.69 times 10 to the 1, 2, negative 2. Remember, if it's a negative exponent, it's less than one. If it's a positive exponent, it's greater than one. Okay? So the implied decimal is there on this one. So you go 1, 2, 3. So we've got negative 1.5, 2, 7 times 10 to the 3. So remember, this one, 1, 2, 3, 4, 5, 6, 7. So it's going to be 7.89 times 10 to the negative 7. So this one here, the decimal's there. Look how many safe things we have since the decimal's only implied it there, right? They only have two safe things on this one. Okay? 3, 4, 5, 6, 7. So it's going to be 9.2 times 10 to the 7. So notice scientific notation only takes it into consideration, the significant digits. Okay? So all the other digits you don't even have to worry about. So it's easier to write this one. Okay? So this one, 1, 2, 3, 0 being significant because it's half to the decimal point. 1.279, it's essentially already in scientific notation, you just got to put the 10 to the 0. So 1.279 to the 0. This 10 to the 0 equals 1, okay? And anything times 1 is the result. And then lastly, we have the decimal point that we got 1, 2. So negative 5.3177 times 10 squared.