Final answer:
The number closest to the square root of 32 is 6.
Step-by-step explanation:
The square root of 32 is between 5 and 6, so we need to determine which of the given options is closest to this range. We can use a calculator to find the square root of 32, which is approximately 5.66. Comparing this to the given options, the number closest to 5.66 is 6 (option b).