Reciprocal of 0.0045 and answer in standard form

Steps:

1. Calculate the reciprocal: Reciprocal = 1 / 0.0045 Reciprocal = 222.222...

2. Convert to standard form (scientific notation): To express 222.222... in standard form, move the decimal point to the left until there is only one non-zero digit before the decimal point. 222.222... becomes 2.222... The decimal point was moved 2 places to the left, so the exponent of 10 is 2.

   Therefore, 222.222... ≈ 2.2 x 10^2 (rounded to two significant figures, matching the input 0.0045).