Two planes start from the same airports and fly in opposite directions. the second plane starts 1/2 hour after the first plane, but it's speed is 70 kilometers per hour faster. find the ground speed of the first plane if 1 hour after the first plane departs the planes are 3980 kilometers apart.

it's undefined because anything multiplied by 0 is 0. that said, 7 days is 168 hours

365

step-by-step explanation:

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|-23|, |29|, |34|, |-38|, |-45|, |-47|, |-59|,   |67|, |-78|, |-110|, |-514|, |710|

step-by-step explanation:

absolute value gets rid of any negative