B. The heat travels to the pan and therefore heats the water
5 sig figs! count everything after the decimal

Actually Welcome to the Concept of the Lens and Ray Optics.
We must understand the Concept that,
1.) When a beam of parallel light pass through a Convex lens, all the rays get deviated and converges to a special point at the axis that is a Focus.
2.) When a beam of light passes through the Concave lens,the light beams diverge from one another forming a virtual focus in the primary side of lens,
Hence the above given diagram beam rays are diverging, it is a CONCAVE LENS
answer is C.) Concave lens
Answer:c. At 20% efficiency, how many kWh would actually be produced from the 5 gal of gasoline? How many BTUs of heat would be released from burning the gasoline? (3 points) 1.3 x 10 J x 1 kWH / 3.6 x 10 J = 36.1 kWh 5.2 x 10 J x 1 BTU / 1055 J = 492891 BTU 36.1 kWh would actually be produced from 5 gallons of gasoline.
Explanation:
I hope I help