When do we use = and when do we use ~

1 answer:

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When we use this = it means it is the exact
answer
When we use ≈ it means it is an estimated answer and not the exact answer Example 12.4684729572974729758328 ≈ 12

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Cory has 15 die-cast cars in his collection. Each year his collection increases by 20%. Roger has 40 cars in his collection. Eac

solmaris [256]

Cory gains 3 cars a year and Roger 1.
Cory - 18 (6 x 3) : Roger - 6 (6 x 1)
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4 years ago

The bike store marks up the wholesale cost of all of the bikes they sell by 30%.

Dmitrij [34]

Answer:

Suppose that the wholesale of a bike is A (A is the 100% in this case). If we have an increase of 30% for the sale price, we have the new price of:

Price = A + (30%/100%)A = A + 0.3*A = (1.3)*A

Then if we know that the price tag of the bike is $125, then we have:

$125 = (1.3)*A

$125/1.3 = A = $96.15

The wholesale cost of the bike is $96.15

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