4,200 people would be on all the blimps
Usually you are given more information about the rectangle such as distance of length in terms of width.
You know that the formula for perimeter is
P=2(l+w)
Substitute p and the other values to find width.
Hope I helped :)
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The Yellow card is used as a warning as a result of the actions of a player on the field
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Step-by-step explanation:

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I think it's 1.5 I'm not sure ._.