book Maths Puzzle Numerical Ability

The package of a model car states that the ratio of the length of a real car is 1:25. What is the ratio of the amount of paint required to cover the model to the amount required to cover the real car?

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Question: Find the equation of a line that contains the point(-2,4) and is parellel to the y=2x-3. Please show the steps. I am new at Algebra i havent have PRe-algerbra they just move me and i am so nervous because i dont know anything about that can u help me.PLEASE.
THANKS!!!