A Car Leaves an Intersection Traveling West

question 1

Multiple Choice

A car leaves an intersection traveling west. Its position 4 sec later is 26 ft from the intersection. At the same time, another car leaves the same intersection heading north so that its position 4 sec later is 26 ft from the intersection. If the speeds of the cars at that instant of time are 12 ft/sec and 10 ft/sec, respectively, find the rate at which the distance between the two cars is changing. Round to the nearest tenth if necessary.

• A)15.6 ft/sec
• B)3.7 ft/sec
• C)3.1 ft/sec
• D)36.8 ft/sec

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