If a car is speeding down a road at 40 miles/hour miles/hour (mph mph ), how long is the stopping distance D 40 D40D_40 compared to the stopping distance D 25 D25D_25 if the driver were going at the posted speed limit of 25 mph mph ?

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

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also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt