4. At 1:59 PM, a car leaves an intersection headıng east at a constant rate of 40 ft/sec. One minute later, at 2 PM, a second car leaves the same intersection heading north at the constant rate of 100 ft/sec. Find the rate at which the distance between the two cars is changing at 2:01 PM. 5. The altitude of a triangle increases at a rate of 1 cm/min while its area increases at a rate of 3 cm-/min. At what rate is the base of the triangle changing when the altitude is 10 cm and the

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
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Chapter6: Vector Spaces
Section6.7: Applications
Problem 18EQ
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4. At 1:59 PM, a car leaves an intersection heading east at a constant rate of 40 ft/sec. One
minute later, at 2 PM, a second car leaves the same intersection heading north at the constant
rate of 100 ft/sec. Find the rate at which the distance between the two cars is changing at 2:01
PM.
5. The altitude of a triangle increases at a rate of 1 cm/min while its area increases at a rate of 3
cm/min. At what rate is the base of the triangle changing when the altitude is 10 cm and the
area is 130 cm?
Transcribed Image Text:4. At 1:59 PM, a car leaves an intersection heading east at a constant rate of 40 ft/sec. One minute later, at 2 PM, a second car leaves the same intersection heading north at the constant rate of 100 ft/sec. Find the rate at which the distance between the two cars is changing at 2:01 PM. 5. The altitude of a triangle increases at a rate of 1 cm/min while its area increases at a rate of 3 cm/min. At what rate is the base of the triangle changing when the altitude is 10 cm and the area is 130 cm?
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