Question

Nolan used the following procedure to find an estimate for StartRoot 18 EndRoot.

Answer 1

Answer:

In step 3, he should have determined which square is closest to 18.

Answer 2

Answer:

Nolan correctly identified the square  numbers before and after 18.

The square roots of them are 4 and 5.

Clearly, square root of 18 should lie between 4 and 5 only.

He, then carefully squared 4.1, 4.2, 4.3 etc. and identified that 4.3 squared is nearer to 18.

Since, Nolan is finding estimated square root, his steps are cool and he didn't make any error.