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3) The exact side length is 3.87

4) 8.66

5) 49

6) 1.69

Step-by-step explanation:

3)

4)

5)

6)

3:√15 in

4: 5√3 m

5: 49 m²

6: 1.69 in²

Step-by-step explanation:

To find the area of a square you take the lenght and multiply it by its width

The special thing about a square is that all sides are equal meaning length=width so we only need one side to get all the information we need

For this question x will be the side of a square

3: Area= x²

15=x²

√15=x

4: same deal as 3

75=x²

√75=5√3

5: This is even easier then the other two

we adjust our equation to look like the following

area=side²

so area=7²=49

49

6: same deal as before

1.3²=1.69

b is the correct answer