30) What is 0 .00258954 rounded to 4 significant figures 7 a. 0.0025 b. 0.002589 c. 0.002590 d. 0.002580

To round 0.00258954 to 4 significant figures, we need to look at the fifth digit, which is 9. Since 9 is greater than or equal to 5, we round up the fourth digit (8) by one, resulting in 0.00259.<br /><br />Therefore, the correct answer is:<br /><br />c. 0.002590