Monday

July 28, 2014

July 28, 2014

Posted by **Amy** on Tuesday, October 15, 2013 at 10:45pm.

- Calculus Practice Problems -
**Reiny**, Tuesday, October 15, 2013 at 11:03pmA = (1/2) b h

dA/dt = (1/2)(b dh/dt + h db/dt)

given: dA/dt = 2 , dh/dt = 1 , A = 91 , h = 7 ,

we need the base b,

from A = 1/2)bh

91 = (1/2)(7b)

182 = 7b

b = 26

2 = (1/2)(26(1) + 7db/dt)

4 = 23 + 7db/dt

db/dt = -19/7 cm/min

At that moment, the base is decreasing at 19/7 cm/min

**Related Questions**

calculus - The altitude of a triangle is increasing at a rate of 3.000 ...

Math - The altitude of a triangle is increasing at a rate of 2500 centimeters/...

CAL - The altitude of a triangle is increasing at a rate of 2500 centimeters/...

CAL - The altitude of a triangle is increasing at a rate of 2500 centimeters/...

Calculus - The side of a square box is increasing at a rate of 4mm/s and its ...

calculus - the sides of an equilateral triangle are increasing at a rate of 27 ...

calculus - at a certain instant the base of a triangle is 5 inches and is ...

Math calculus - The altitude of a triangle is increasing at a rate of 1000 ...

Calculus - The altitude of a triangle is increasing at a rate of 3000 ...

calculus - The sides of an equilateral triangle are increasing at the rate of 5 ...