Question

Plz help me on this question

Answer 1

Let number
`c=√(45).`

Square this number:

`c^2=45.`

Since

`36<45<49,`

you can state that

`√(36)<√(45)<√(49),\\ \\6<√(45)<7.`

Also
`√(45)\approx 6.708` and
`6.5<x_C<7`, then point C is the best approximation of
`√(45).`

Answer: option C.