Question

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Answer 1

Answer:

displacement is the shortest distance covered by the object from its initial and final position.

Explanation:

eat chocolate

Answer 2

Answer:

(i)402

We know that 20

2

=400 and 21

2

=441

So, we need to subtract 402−400=2 from 402 to get a perfect square

(ii)1989

We know that 44

2

=1936 and 45

2

=2025

So, we need to subtract 1989−1936=53 from 1989 to get a perfect square

(iii)3250

We know that 57

2

=3249 and 58

2

=3364

So, we need to subtract 3250−3249=1 from 3250 to get a perfect square

(iv)825

We know that 28

2

=784 and 29

2

=841

So, we need to subtract 825−784=41 from 825 to get a perfect square

(v)4000

We know that 63

2

=3969 and 64

2

=4096

So, we need to subtract 4000−3969=31 from 4000 to get a perfect square