### Home > CCG > Chapter Ch7 > Lesson 7.2.3 > Problem 7-80

7-80.

It is often useful to estimate the value of a square root to determine if your answer is reasonable.

What would be a reasonable estimate of

? Explain your thinking. After you have made an estimate, check your estimation with a calculator. because , so must be a little higher. Repeat this process to estimate the values below.

(1)

(2)

(3)

(4)

Since square root of

is , then square root of is a little more .