How many cubic blocks of side length
7 inch would it take to fill a
cube with a side length of 7 inch?

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Calculate the areas of them:

area = l x w

area = 7 x 7 = 49

(Note : this is the area of the cubic block)

area = l x w

area = 7 x 7 = 49

Now divide them:

49/49 = 1

Thus, you could fit 1 cubic block in it.

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step-by-step explanation:

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