Here are the solutions to the problems: 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: Step 1: Locate the number 654.8 in the "number" column of the cube root table. If the table is for numbers $N$ and their cube roots $\sqrt[3]{N}$, you would look for 6.548 and adjust the decimal. Step 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: $$ \sqrt[3]{654.8} \approx 8.6830 $$ The cube root of 654.8 is approximately $\boxed{8.683}$. 30. The volume of a cube was 0.007984 using mathematical table, find its length. The volume $V$ of a cube with side length $L$ is given by the formula $V = L^3$. To find the length $L$, we need to calculate the cube root of the volume: $L = \sqrt[3]{V}$. Step 1: Substitute the given volume into the formula. $$ L = \sqrt[3]{0.007984} $$ Step 2: 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, $0.007984 = 7.984 \times 10^{-3}$. Then $\sqrt[3]{7.984 \times 10^{-3}} = \sqrt[3]{7.984} \times \sqrt[3]{10^{-3}} = \sqrt[3]{7.984} \times 10^{-1}$. You would look up $\sqrt[3]{7.984}$ 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. $$ L = \sqrt[3]{0.007984} $$ $$ L \approx 0.199866 $$ The length of the cube is approximately $\boxed{0.1999}$. 31. a) Construct a parallelogram WXYZ such that WX = 7cm, WZ = 5cm, $\angle WXY = 120^\circ$. To construct the parallelogram WXYZ: Step 1: Draw a line segment WX of length 7 cm. Step 2: At point X, use a protractor to construct an angle of $120^\circ$ with WX. Step 3: Along the arm of the $120^\circ$ angle from X, mark point Y such that XY = 5 cm (since opposite sides of a parallelogram are equal, XY = WZ). Step 4: From point W, draw an arc with a radius of 5 cm (length of WZ). Step 5: From point Y, draw an arc with a radius of 7 cm (length of YZ, which is equal to WX). Step 6: The intersection of the arcs from Step 4 and Step 5 is point Z. Step 7: Join WZ and YZ to complete the parallelogram WXYZ. That's 2 down. 3 left today — send the next one.