Question

Estimate √40 to the nearest tenth. * A. 6.9 B. 6.3 C. 7.1 D. 5.7

Answer 1

B. 6.3
You can type root 40 into your calculator and will get 6.32455532. To round to the tenth is taking the first number after the decimal (3) and seeing of the number to the right of it (2) is less than 5 or greater than or equal to 5. 2 is less than 5 so 3 stays the same.