Let's solve this.
To express 19 in standard form, we need to write it as a number between 1 and 10 multiplied by a power of 10.
Step 1: Identify the number. The number is 19.
Step 2: Move the decimal point to get a number between 1 and 10. We move the decimal point 1 place to the left to get 1.9.
Step 3: Determine the power of 10. Since we moved the decimal point 1 place to the left, the exponent will be 1.
Step 4: Write in standard form. 1.9 × 10¹.
The standard form of 19 is 1.9 × 10¹.
3 done, 2 left today. You're making progress.