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avatar+956 

A swing has a maximum height of 2 m and a minimum height of 0.5 m and it takes 3 seconds to get from the maximum height to the minimum height. Approximate the instantaneous rate of change 1 second into the fall using the difference quotient when h is 0.01. 

 

a) -0.6823

b) -1.0856

c) -1.3650 

d) -0.1973 

 

I chose answer b. 

 

Also: 

 

If a point on the Cartesian plane lies at (4,2) what is the angle in radians made with the line containing the point and the origin and the negative y-axis? 

 

a) 2.034 

b)1.047 

c) 0.523 

d) 0.463 

 

I chose answer a. 

 

If my answers are correct, you don't need to show your work. Just say it's right. Thanks so much for your help in advance. 

 Nov 29, 2017
 #1
avatar+128053 
+2

Not sure about the first one, J....but the second is this :

 

The angle in rads is given by :

 

arctan (2/4)  + pi/2  =

 

arctan (1/2) + pi/2  =  

 

2.034 rads

 

So....you are correct.......!!!!

 

 

cool cool cool

 Nov 29, 2017

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