Question

What are the two closest perfect squares to use to estimate √89?

(A) 81 and 100
(B) 64 and 100
(C) 81 and 121
(D) 64 and 121

Answer 1

The two closest perfect squares to use to estimate √89 are 81 (9²) and 100 (10²), so the correct answer is (A) 81 and 100.

Step-by-step explanation:

The question asks to identify the two closest perfect squares to estimate √89. The perfect squares are numbers that have an integer as their square root. To find the closest perfect squares to 89, we look for the squares of whole numbers just below and above 89. 81 is 9² and 100 is 10², so these are the two closest perfect squares to 89. Therefore, the correct answer is (A) 81 and 100.