What is 9x10-4 written in standard form?

Answer 1

9 x 10-4 = .0009

A negative exponent in scientific notation means you need to move the decimal to the left that many times.

Step by Step, one decimal at a time.

9 x 10-4 = 0.9x 10-3

0.9 x 10-3= 0.09x 10-2

0.09 x 10-2= 0.009x 10-1

0.009 x 10-1= 0.0009 x 100 (remember, 100 = 1)

0.0009 x 100 =0.0009 x 1 = 0.0009