Final answer:
To find the number of blue beads on Heather's necklace, multiply 74 by 0.5 to get 37 blue beads. Hence the correct answer is option A
Step-by-step explanation:
To find the number of blue beads on Heather's necklace, we need to calculate 50% of 74. To do this, we can multiply 74 by 0.5.
50% of 74 is: 74 * 0.5 = 37
Therefore, there are 37 blue beads on Heather's necklace. So the correct answer is C) 37 blue beads.