To write 7,200 in scientific notation, you express it as a number between 1 and 10 multiplied by a power of 10.
First, identify where to place the decimal point to create a number between 1 and 10. For 7,200, you can write it as 7.2.
Next, determine the power of 10. Since you moved the decimal point 3 places to the left to get from 7,200 to 7.2, the exponent will be 3.
Putting it all together, 7,200 in scientific notation is:
\[ 7.2 \times 10^3 \]