How many cubic feet of concrete are needed to pour 4 cylindrical pillars 6 feet high with a diameter of 0.75 feet? Round final answer to the nearest thousandth.

To calculate the volume of one cylindrical pillar, use the formula: \( V = \pi r^2 h \). The radius \( r \) is half of the diameter, which is \( 0.75/2 = 0.375 \) feet. Thus, the volume of one pillar is \( V = \pi (0.375)^2 (6) \approx 2.645 \) cubic feet. For 4 pillars, the total volume is \( 4 \times 2.645 \approx 10.58 \) cubic feet. Rounding to the nearest thousandth, you'll need approximately **10.580 cubic feet** of concrete. Concrete structures, like your cylindrical pillars, can be seen all around—from buildings to bridges! The beauty of concrete is its versatility: it can be molded into various shapes and provides strong support. When calculating volume for any project, always double-check your measurements and formulas to ensure you get an accurate estimation, especially for large structures, as it can save you time and resources in the long run.