Final answer:
To express the number 5.0 x 10⁻² in decimal notation, you need to move the decimal point two places to the left. The number 5.0 x 10⁻² in decimal notation is 0.05.
Step-by-step explanation:
To express the number 5.0 x 10⁻² in decimal notation, you need to move the decimal point two places to the left since the exponent is negative.
Starting from 5.0, move the decimal point two places to the left and we get 0.05
Therefore, the number 5.0 x 10⁻² in decimal notation is 0.05.