0.00001207 = 1.207E-5
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The standard form is 216 Exponent form is 2.16 x 102
To write 384400 in standard form, you would express it as a number between 1 and 10 multiplied by a power of 10. In this case, 384400 can be written as 3.84400 x 10^5 in standard form. The decimal point is placed after the first digit, and the exponent indicates how many places the decimal point was moved to obtain the original number.
That is the standard form.
144 can be written as 1.44 × 102
0.0455 is the standard form.