book Maths Puzzle Numerical Ability

Hi! Mathematicians..i hope you can help me solve the following problems with solutions so i can review the answers. thanks!

18) How many square kilometers is a rectangular fie

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book Other Question

6) The volume of a cube is given by V = s^3. Find the length of a side of a cube if the Volume is 1000 cm^3.
Answer:
Show work in this space. Write an equation for the parabola with focus (1,3) and vertex (0,3).

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