A adult blinks about 450 times every 30 minutes. a 12 year old blinks about 150 times every 15 minutes. how many more times does
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notice... the dog's pen perimeter, does not include the side that's bordering the garden's, since that side will use the heavy duty fence, instead of the light one
so, the sum of both of those costs, will be the C(x)
so, just take the derivative of it, and set it to 0 to find the extremas, and do a first-derivative test for any minimum