Two jets leave an airport at the same time, flying in opposite directions. the first jet is traveling at three hundred seventy-seven mph and the other at two hundred seventy-five mph. how long will it take for the jets to be 9128 miles apart?

First, you need to do is do three hundred seventy-five times nine thousand one hundred twenty eight. Making that equal three million four hundred twenty three thousand. 
Then you need to do 275 x 9128. Making that equal 2,510,200. 
Next, you should do three million four hundred twenty three thousand plus two million five hundred ten thousand two hundred making that equal five million nine hundred thirty three thousand two hundred.
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Ithink the answer would be knew