What is the correct wat towrite 0.0000250 m kn scientific notation?

2.50 × 10⁻⁵  m

Explanation:

A number in scientific notation has the form A × 10ⁿ.

A is a number from 1 to 10, but not 10 itself and is called the coefficient.

n is an integer and is called the exponent.

To convert a small decimal number to exponential notation, you move the decimal point to the right until you have one nonzero digit in front of the decimal point.

The exponent is negative of the number of places you moved the decimal point.  

To convert 0.000 0250 m to scientific notation:

Move the decimal point to the right until it is just past the 1. The coefficient is 2.50

Count the number of places you have moved the decimal (5). The exponent is -5.

The number in scientific notation is 2.50 × 10⁻⁵.

Add the units and the measurement is 2.50 × 10⁻⁵ m.

i'm pretty sure its b i might be wrong though!