Answer:
Option C.
Option B.
Step-by-step explanation:
By definition, the square of a number is that number times itself.
The square root of a perfect square is a whole number.
Since the square root of another number (not perfect square) is not a whole number, you can estimate it finding two perfect square roots that number is between.
1) Observe that 4 and 9 are perfect squares:
And 8 is between those numbers.
Therefore, the square roots and
are used to estimage
2) Notice 36 and 49 are perfect squares:
And 42 is between those numbers.
Therefore, the square roots and
are used to estimage