Hypermiling, a term coined by efficiency expert Wayne Gerdes, means improving a car’s gas mileage using simple methods. A person who practices hypermiling on a regular basis can achieve a 50 percent or better improvement in a vehicle’s official fuel economy estimate.
Improving fuel economy through hypermiling can work for any vehicle. The driver of a 2005 Honda Accord, for example, went from 24 mpg to 35 mpg after adopting hypermiling techniques for one year. Gerdes himself set a world record in 2009 after driving a Ford Fusion Hybrid for 1,445 miles on a single tank of gas. He was able to achieve a fuel economy of 81 mpg, which is more than double the EPA estimate for fuel economy in a Fusion.
Most hypermiling techniques are easy to implement. Driving at lower speeds leads to less fuel consumption. Be sure to drive the posted speed limit—or even slower—to save money. Slowing down also benefits drivers by preventing excessive braking, which reduces gas mileage by as much as 33 percent. Idling the engine for longer than a few minutes can also be costly at the gas pump. Simply by making a few common sense changes, hypermilers can save money and protect the environment.
5
Select the correct answer.
The author mentions the driver of a 2005 Honda Accord in the second paragraph in order to
A.
provide a real-life example of the benefits of hypermiling.
B.
introduce the idea that hypermiling only works on new cars.
C.
suggest that hypermiling is a propaganda tool to sell hybrid vehicles.
D.
show that hypermiling provides only limited benefits to drivers.

read this excerpt from “incidents in the life of a slave girl.”

i went about my evening work with trembling steps. mr. flint twice called from his chamber door to inquire why the house was not locked up. i replied that i had not done my work. "you have had time enough to do it," said he. "take care how you answer me! "

i shut all the windows, locked all the doors, and went up to the third story, to wait till midnight. how long those hours seemed, and how fervently i prayed that god would not forsake me in this hour of utmost need! i was about to risk everything on the throw of a die; and if i failed, o what would become of me and my poor children? they would be made to suffer for my fault.

at half past twelve i stole softly down stairs. i stopped on the second floor, thinking i heard a noise. i felt my way down into the parlor, and looked out of the window. the night was so intensely dark that i could see nothing. i raised the window very softly and jumped out. large drops of rain were falling, and the darkness bewildered me. i dropped on my knees, and breathed a short prayer to god for guidance and protection. i groped my way to the road, and rushed towards the town with almost lightning speed.

what is the main idea of this excerpt?

harriet worked for a man called mr. flint who became very impatient when she did not finish her work.

harriet waited until after midnight to run down the stairs and jump out of a window into the rain.

harriet was a frightened young girl who found the faith and courage to leave her home for an unknown life.

harriet felt very nervous about running away because she did not like being alone in the darkness.

explanation:

this is the answer , p = 1 + (1/10)x

step-by-step explanation:

we have,

at sea level pressure is 1 atmosphere (i.e at x =0, p0=1 atmosphere)

at depth 23 meters , pressure = 3.3 atmosphere

since the pressure increases at constant rate as the depth increases, so we can write a relation as:

p =p0 +   kx   , where p is the pressure  , p0 is the initial pressure, x is the depth and k is constant rate of increasing.

to find constant rate k, plug p = 3.3 , p0 = 1 and x= 23 meters

we get,

  3.3 = 1 + k * 23

k = 2.3 / 23   = 1/10

so we can write the function formula as:   p = 1 + (1/10)x

eli whitney was an american inventor best known for inventing the cotton gin. this was one of the key inventions of the industrial revolution and shaped the economy of the antebellum south.

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