Answer:
The land that is covered with an irrigation arm of 370 ft is 
Step-by-step explanation:
<u>Area of the circle</u>
Being r the radius of a circle, its area can be calculated as follows:

The irrigation arm acts as the radius of the irrigation circle, thus r=370 ft. The land covered is the area under the irrigation arm, thus:


The land that is covered with an irrigation arm of 370 ft is 
Carlos will use 8 shelves with 3 novels and 2 autobiographies on each.
Answer:
Hi there!
Surface~ is the outside part, uppermost area
Area~ the extent or measurement of a surface
Answer:
the first is true
Step-by-step explanation: