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Type: Posts; User: muzik

1. ## Thread: Tangents and the Derivative of V=(4/3)* π * r^3 at a point (r = 4)

by muzik
Replies
9
Views
1,135

### Thank you!! And thanks for the challenge. When...

Thank you!!
And thanks for the challenge. When I do get some time I'll give it a shot. Now that I know the answer. I need all the practice I can get. I got a test on Thursday but got to finish up...
2. ## Thread: Tangents and the Derivative of V=(4/3)* π * r^3 at a point (r = 4)

by muzik
Replies
9
Views
1,135

### Ahhh so much better to determine the derivative...

Ahhh so much better to determine the derivative first.

The volume changes at a rate of 4/3*pi*48. Thanks all for you help.
3. ## Thread: Tangents and the Derivative of V=(4/3)* π * r^3 at a point (r = 4)

by muzik
Replies
9
Views
1,135

### You're right. thanks

You're right. thanks
4. ## Thread: Tangents and the Derivative of V=(4/3)* π * r^3 at a point (r = 4)

by muzik
Replies
9
Views
1,135

### I am going to try and determine the derivative...

I am going to try and determine the derivative first. then input the r value after. I didn't realize i could of factored out the constant. I'll see if that helps me on my next approach. I'm working...
5. ## Thread: Tangents and the Derivative of V=(4/3)* π * r^3 at a point (r = 4)

by muzik
Replies
9
Views
1,135

### Well if continue as started. My lim is this big...

Well if continue as started. My lim is this big long expression. And I'm lost on how to simplify it.
So I will try to differentiate first as you suggested.

Thanks
6. ## Thread: Tangents and the Derivative of V=(4/3)* π * r^3 at a point (r = 4)

by muzik
Replies
9
Views
1,135

### Tangents and the Derivative of V=(4/3)* π * r^3 at a point (r = 4)

What is the rate of change of the volume of a ball
V=(4/3)* π * r^3

The volume changes at a rate of?

7. ## Thread: Continuity lim x->-13*pi/14 cos(7x - cox(7x))

by muzik
Replies
14
Views
850

### Thank you for your help. I now understand the...

Thank you for your help. I now understand the problem and got the answer correct. i was going to input 1 but waited like you said proof read before submit. I wasn't sure on 1 as the answer so i...
8. ## Thread: Continuity lim x->-13*pi/14 cos(7x - cox(7x))

by muzik
Replies
14
Views
850

### Thanks for you help. i know understand. took me...

Thanks for you help. i know understand. took me awhile.
9. ## Thread: Continuity lim x->-13*pi/14 cos(7x - cox(7x))

by muzik
Replies
14
Views
850

### so.. =cos((3pi/2)-cos(3pi/2)) correct? ...

so..

=cos((3pi/2)-cos(3pi/2)) correct?
=cos((3pi/2)-0)
=cos(3pi/2)
=0

I got 1 because my algebra needs a lot of help. Thanks for you help.
10. ## Thread: Continuity lim x->-13*pi/14 cos(7x - cox(7x))

by muzik
Replies
14
Views
850

### cos(pi/2)=0 see my answer in previous post....

cos(pi/2)=0

see my answer in previous post. does my work look correct? answer is 1?

by muzik
Replies
14
Views
850

cos(-pi/2) ?
12. ## Thread: Continuity lim x->-13*pi/14 cos(7x - cox(7x))

by muzik
Replies
14
Views
850

### So i'm down to cos((-pi/2)-cos(-pi/2))...

So i'm down to

cos((-pi/2)-cos(-pi/2)) correct?
=cos((-pi/2)-0)
=cos(0-0)
=cos (0)
=1
13. ## Thread: Continuity lim x->-13*pi/14 cos(7x - cox(7x))

by muzik
Replies
14
Views
850

### I was trying to simplify. The 7 with the...

I was trying to simplify. The 7 with the denominator 14. so with out the cosine I was trying to simplify 7(-13*pi/14) so I that's how I got -13*pi/2. oops and I wrote -13*pi/7 in my earlier post.
...
14. ## Thread: Continuity lim x->-13*pi/14 cos(7x - cox(7x))

by muzik
Replies
14
Views
850

### Thanks for the replies and sorry for the typos...

Thanks for the replies and sorry for the typos
Stapel, Yes that's correct interpretation.

ok if I enter into calculator I get 0.8414.

It's my last attempt on the answer for the problem. Does...

by muzik
Replies
14
Views
850