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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. 

Julius  Nov 29, 2017
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1+0 Answers

 #1
avatar+79846 
+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

CPhill  Nov 29, 2017

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