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Use the tables of cubes to find the cube root of the following 654.8.

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29. Use the tables of cubes to find the cube root of the following 654.8.

To find the cube root of 654.8 using mathematical tables:

  1. Locate the number 654.8 in the "number" column of the cube root table.

    If the table is for numbers NN and their cube roots N3\sqrt[3]{N}, you would look for 6.548 and adjust the decimal.

  2. Read the corresponding value in the "cube root" column.

    Since I do not have access to a physical mathematical table, I will provide the value obtained using a calculator, which approximates the result you would get from a sufficiently detailed table.

    Using a calculator:

    654.83≈8.6830\sqrt[3]{654.8} \approx 8.6830

    The cube root of 654.8 is approximately 8.683\boxed{8.683}.

    30. The volume of a cube was 0.007984 using mathematical table, find its length.

    The volume VV of a cube with side length LL is given by the formula V=L3V = L^3.
    To find the length LL, we need to calculate the cube root of the volume: L=V3L = \sqrt[3]{V}.

  3. Substitute the given volume into the formula.

    L=0.0079843L = \sqrt[3]{0.007984}
  4. To use a mathematical table for cube roots, you would typically adjust the number to be between 1 and 1000, find its cube root, and then adjust the decimal place.

    For example, 0.007984=7.984×10−30.007984 = 7.984 \times 10^{-3}. Then 7.984×10−33=7.9843×10−33=7.9843×10−1\sqrt[3]{7.984 \times 10^{-3}} = \sqrt[3]{7.984} \times \sqrt[3]{10^{-3}} = \sqrt[3]{7.984} \times 10^{-1}. You would look up 7.9843\sqrt[3]{7.984} in the table and then multiply by 0.1.

    Since I do not have access to a physical mathematical table, I will provide the value obtained using a calculator.

    L=0.0079843L = \sqrt[3]{0.007984} L≈0.199866L \approx 0.199866

    The length of the cube is approximately 0.1999\boxed{0.1999}.

    31. a) Construct a parallelogram WXYZ such that WX = 7cm, WZ = 5cm, ∠WXY=120∘\angle WXY = 120^\circ.

    To construct the parallelogram WXYZ:

  5. Draw a line segment WX of length 7 cm.

  6. At point X, use a protractor to construct an angle of 120∘120^\circ with WX.

  7. Along the arm of the 120∘120^\circ angle from X, mark point Y such that XY = 5 cm (since opposite sides of a parallelogram are equal, XY = WZ).

  8. From point W, draw an arc with a radius of 5 cm (length of WZ).

  9. From point Y, draw an arc with a radius of 7 cm (length of YZ, which is equal to WX).

  10. The intersection of the arcs from Step 4 and Step 5 is point Z.

  11. Join WZ and YZ to complete the parallelogram WXYZ.

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