Answer:
select them all. all is correct
Step-by-step explanation:
Answer:

Total weight of gravel on the roof = 
Step-by-step Explanation:
The area Adams planned to cover with gravel can be divided into 3 rectangles as shown in the diagram attached.
We would have 3 rectangles. See the attachment below to check out how we arrive at the dimensions of the 3 rectangles.
Area of rectangle = L*W
Area to be covered by gravel = area of rectangle 1 + area of rectangle 2 + area of rectangle 3
Area to be covered with gravel = 

Total weight of gravel on the roof = 12 pounds per square foot multiplied by total area of the roof to be covered = 
Answer:
10
Step-by-step explanation:
1 out of 50 got it, so 500/50=10
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