The square of a whole number is between 2000 and 2500. The number much be between ...

A. 30 & 35

B. 35 & 40

C. 40 & 45

D. 45 & 50

D is the correct choice.

Step-by-step explanation:

30^2 = 900, which is less than 2000 and thus too small. Reject choice A.

35^2 = 1225, which is less than 2000 and thus too small. Reject choice B.

40^2 = 1600, less than 2000. Reject choice C.

45^2 = 2025, which is greater than 2000 but less than 2500. This is the correct choice. D is correct.