In 89.624, the decimal places are: tenths (0.1), hundredths (0.01), thousandths (0.001).

• (a) The digit 2 is in the hundredths place, so its value is 2 × 0.01 = 0.02.
• (b) The tenths place is the first after the decimal: 6.
• (c) The digit 4 is in the thousandths place, so its value is 4 × 0.001 = 0.004.

Final Answer: (a) 0.02, (b) 6, (c) 0.004