A. A rectangular slab of concrete is cut from a large block. The slab measures 10.4 inches thick, 1.8 feet long, and 0.0021 miles wide. Find its volume in cubic feet.

To find the volume of the rectangular slab in cubic feet, we need to convert all the given measurements to the same units, which can be feet in this case.

1. Convert inches to feet:
Since 1 foot is equal to 12 inches, to convert inches to feet, we divide the measurement by 12. Therefore, the thickness of the slab in feet is 10.4 inches / 12 = 0.8667 feet.

2. Convert miles to feet:
Since 1 mile is equal to 5,280 feet, to convert miles to feet, we multiply the measurement by 5,280. Hence, the width of the slab in feet is 0.0021 miles * 5,280 = 11.088 feet.

Now that we have converted all the measurements to feet, we can calculate the volume of the slab in cubic feet using the formula:
Volume = length * width * thickness.

3. Calculate the volume:
Volume = 1.8 feet * 11.088 feet * 0.8667 feet = 17.881 cubic feet.

Therefore, the volume of the rectangular slab is 17.881 cubic feet.