Match each decimal number to its equivalent in scientific notation.
1. 15
2. 1.5
3. 0.015
4. 0.15
5. 150

a) (1.5 × 10⁻²)
b) (1.5 × 10¹)
c) (1.5 × 10²)
d) (1.5 × 10⁰)