A balloon is rising vertically over a point A on the ground a rate of 15 ft/sec. A point B on the ground is level with and 30 ft from A. When the balloon is 40 ft from A, at what rate is its distance from B changing?

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A balloon is rising vertically over a point A on the ground a rate of 15 ft/sec. A
point B on the ground is level with and 30 ft from A. When the balloon is 40 ft
from A, at what rate is its distance from B changing?
13 ft/sec
15 ft/sec
12 ft/sec
O 10 ft/sec
Transcribed Image Text:A balloon is rising vertically over a point A on the ground a rate of 15 ft/sec. A point B on the ground is level with and 30 ft from A. When the balloon is 40 ft from A, at what rate is its distance from B changing? 13 ft/sec 15 ft/sec 12 ft/sec O 10 ft/sec
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