Question

Estimate the value of 2√2 to the nearest tenth.

Answer 1

2.8

Explanation:

2
`√(2)` = 2.82842712475

Round 2.82

Since two can not round 8 up to a 9 it will stay an 8.

Answer 2

Answer:2.8

Explanation:

I know my decimal representation of sqrt2, because I memorize random square roots. It is 1.414. Thus, 2* 1.414 is 2.828. If you don't know know this fact, note that 1.5 ^2 = 2.25, just a little too big. 1.4^2 =1.96, just a little too small. Thus, it is approxamately 1.4. 1.4 *2= 2.8