Which one of the following is a list of devices from least efficient to most efficient

a. light-bulb, automobile engine, power plant, electric motor
b. home oil furnace, light bulb, electric motor, automobile
c. power plant (thermal), automobile engine, light-bulb (fluorescent), light-bulb (incandescent)
d. power plant (thermal), automobile engine, light-bulb (incandescent), light-bulb(fluorescent)

(A)-Light-Bulb, Automobile Engine, Power Plant, Electric Motor

Explanation:

To get the least efficient to the most efficient the chart below explains how to the get it

Incandescent light bulb-5%

Florescent light bulb-20%

Electric motor-90%

Power plant-35%

Automobile engine-25%

Home oil furnace-80%

x+2 because it just doubles hon so the pattern can actually tell you the expression.

so for example,

if x=2 then 2+2 is 4

if x=4 then 4+4 is 8

and so on and so forth.

i really hope that this makes sense and you out in a way hon: )