She will use 13 there are four 1/4 per cup 4 times 3 plus 1 =13
8.75 x 420.3 = 3677.625 m
3677.625/1125.803 = 3.266668 ft/sec
Answer:
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190-(50+80)t=0
190-130t=0
130t=190
t=19/13 so the trains will remain apart for 19/13 hours.
Since ironman is flying at a constant rate of 150mph he will fly:
150(19/13)≈219.23 miles in that time period while the trains are apart.