HELP ASAP:the graph below shows the change an underground water storage of several regions in California Central Valley from 1962 to 2002. the bold dark line on the graph represents the change for the entire central valley groundwater system, which is the largest water reservoir in the state of California. the groundwater supply in this system was depleted by almost 60million acre feet in the 40 years represented by the graph.​

Which accurately compares concave and convex lenses?

Arefrigerator uses r-134a as the working fluid and operates on the ideal vapor-compression refrigeration cycle except for the compression process. the refrigerant enters the evaporator at 120 kpa with a quality of 34 percent and leaves the compressor at 70°c. if the compressor consumes 450 w of power, determine (a) the mass flow rate of the refrigerant, (b) the condenser pressure, and (c) the cop of the refrigerator. (0.00644 kg/s, 800 kpa, 2.03)

What are the dimensions of the cross section that passes through the points a, f, g, and d?