I need engineering help...

The Hubert H. Humphrey Metrodome in Minneapolis opened in 1982 at a cost of $55 million. To prepare for the footings, et cetera, 3.00e5 cubic yards of dirt were removed. The Metrodome's inflatable roof covers 10.0 acres and its interior volume is 60.0e3 cubic feet. During construction, 40.0e3 cubic yards of concrete, 11.9e3 tons of reinforcing steel, and 5.00e2 tons of structural steel were utilized. The roof material includes an outer layer of Teflon-coated glass and an inner layer of woven fiberglass. Given this information, answer the following:

Question

I need engineering help...

The Hubert H. Humphrey Metrodome in Minneapolis opened in 1982 at a cost of $55 million. To prepare for the footings, et cetera, 3.00e5 cubic yards of dirt were removed. The Metrodome's inflatable roof covers 10.0 acres and its interior volume is 60.0e3 cubic feet. During construction, 40.0e3 cubic yards of concrete, 11.9e3 tons of reinforcing steel, and 5.00e2 tons of structural steel were utilized. The roof material includes an outer layer of Teflon-coated glass and an inner layer of woven fiberglass. Given this information, answer the following:

anonymous · Answer

If removed evenly over the 10.0 acres, how deep a hole would be formed as a result of the excavation?

anonymous · Answer

If the two-layer fiberglass roofing material has a mass of 0.667 lbm/ft2, what is the total mass of the roof?

anonymous · Answer

If 10.0 inches of wet snow collected on the roof (this happened in 1982), what is the added mass on the roof? (Assume 1 inch of water equals 10 inches of snow).

anonymous · Answer

If removed evenly over the 10.0 acres, how deep a hole would be formed as a result of the excavation?

first convert 10 acres into square yards

once you have the area, you can divide it from the total volume of dirt dug to get the height dug in yards

anonymous · Answer

If the two-layer fiberglass roofing material has a mass of 0.667 lbm/ft2, what is the total mass of the roof?

we know the roof covers an area of 10 acres

so we need to convert that into square ft because the mass per area is given as lbm /ft^2

once you have the area in square ft, multiply it to the mass per area in order to determine the total mass of the roof

anonymous · Answer

If 10.0 inches of wet snow collected on the roof (this happened in 1982), what is the added mass on the roof? (Assume 1 inch of water equals 10 inches of snow).

assuming it is evenly covered
first determine the total volume of snow or water on top of the roof

then use the density of water (look it up on the internet) to determine the total mass of water

once you have the mass, multiply it by the gravity constant in order to determine total weight of the water on the roof

REMEMBER, CHECK YOUR UNITS
this, I and probably your teacher, cannot stress enough