Answer:
0.000005420=5.42 x 10^(-6)
Explanation:
0.000005420 in scientific notation
You must move the decimal point until you get a number between 1 and 9, in this case you must move the decimal point to the right:
0000005.420 and you must count how many places you moved the decimal point, in this case 6 places, this is the power of the base 10, and when you move the decimal point to the right the power of the base 10 is negative. The zeros to the rigtht and to the left doesn't have value, then:
0.000005420=5.42 x 10^(-6)