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- A convenient time unit for short time intervals is the millisecond. Express 0.0452 s in milliseconds.At 8:00 AM ship S1 is 20 km due north of ship S2. Ship S1 sails south at a rate of 9 kph and ship S2 sails west at a rate of 12 kph. At what rate is the distance between the two ships changing at 9:20 AM. a. 14.76 kph c. 6.71 kph b. 13.42 kph d. 4.20 kph6. A bicyclist rides at 430 ft/min. If they ride for 45 min, how far have they 6. A bicyclist rides at 430 ft/min Tf they ride for 45 min, how far have they gone? a. 0.105 ft 9.56 ft 19350 ft d. 475 ft e. 430 ft
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