Remember?
Forums
New Posts
FAQ
Community
View Site Leaders
Thanks / Like Statistics
Hottest Threads / Posts
Quick Links
Today's Posts
Mark Forums Read
Articles
Blogs
Donate
Register
MHB Info
MHB About Us
MHB Rules
MHB Widgets
MHB Flyers
MHB Blog
P.O.T.W.
For Fun
Arcade
Live Chat
Advanced Search
Member List
Wilmer
Register Now!
It is Free
Math Help Boards
We are an online community that gives free mathematics help any time of the day about any problem, no matter what the level. You will have to register before you can post. To start viewing messages, select the forum that you want to visit from the selection below.
Wilmer
MHB Craftsman
Find latest posts
Find latest started threads
View Articles
View Blog Entries
Mini Statistics
Status
Offline
Join Date
March 19th, 2012
Last Activity
February 23rd, 2017
10:00
Blog Entries
0
More
4
Friends
ZaidAlyafey
Sudharaka
MarkFL
mathbalarka
Recent Visitors
The last 10 visitor(s) to this page were:
Ackbach
,
anemone
,
Bacterius
,
greg1313
,
Jameson
,
kaliprasad
,
MarkFL
,
Pantaron Educat
,
Peter
,
toome
This page has had
3,819
visits
Tab Content
Wilmer's Activity
About Me
Friends
Post Thanks / Like
Tab Content
All
Wilmer
Friends
Photos
New Activity (
)
Please reload this page to view the 200+ new activity items that have been created.
Older Activity
Yesterday,
20:06
MarkFL
replied to a thread
Related Rates
in
Calculus
Yes, the length of his shadow is increasing at a rate of 4/3 ft/s, and the tip of his shadow is moving at a rate of 10/3 ft/s. :D
see more
8 replies | 96 view(s)
Yesterday,
16:29
MarkFL
replied to a thread
Related Rates
in
Calculus
I got 4/3 ft/s where you got 3 ft/s. You have the line: \d{y}{t}=\frac{3}{2}\d{x}{t} Now, this implies: \d{x}{t}=\frac{2}{3}\d{y}{t}
see more
8 replies | 96 view(s)
Yesterday,
16:20
MarkFL
replied to a thread
Compute The Limit
in
Challenge Questions and Puzzles
Nicely done, Chris! (Yes) This is the solution I found elsewhere: We are given to evaluate: \lim_{n\to\infty}\left(\sqrt{\int_0^1...
see more
4 replies | 114 view(s)
Yesterday,
15:15
MarkFL
replied to a thread
Related Rates
in
Calculus
Suppose we wanted to work the problem in general terms. Please refer to the following diagram: $P$ is the height of the pole, $M$ is the...
see more
8 replies | 96 view(s)
February 26th, 2017,
23:47
MarkFL
started a thread
Compute The Limit
in
Challenge Questions and Puzzles
Compute the following limit: \lim_{n\to\infty}\left(\sqrt{\int_0^1 \left(1+x^n\right)^n\,dx}\right)
see more
4 replies | 114 view(s)
February 26th, 2017,
01:48
MarkFL
replied to a thread [SOLVED]
What type of mathematical function is this? Thanks :)
in
Pre-Calculus
We could likely model this with a function of the form (which comes from Newton's Law Of Cooling): f(t)=c_1e^{-kt}+350 Since we know $f(0)=70$,...
see more
1 replies | 77 view(s)
February 26th, 2017,
01:01
MarkFL
replied to a thread
trigonometric inequality challenge
in
Challenge Questions and Puzzles
My solution: Consider the objective function: F(A,B,C)=\sin(A)+\sin(B)+\sin(C)-\cos(A)-\cos(B)-\cos(C) Subject to the constraint: ...
see more
3 replies | 114 view(s)
February 25th, 2017,
23:35
MarkFL
replied to a thread
9.4.5 Identify the equilibrium values
in
Calculus
Let's look at the behavior of the solutions near the equilibrium solution $y=3$. Suppose we have: y(0)=2.9 Then we see: y'<0 And for:
see more
4 replies | 78 view(s)
February 24th, 2017,
11:34
MarkFL
replied to a thread
Hi - Passionate educator looking to help
in
Introductions
Hello and welcome to MHB, Jesse! (Wave) I removed the link to your email address, as that shouldn't be public, and people can just as easily...
see more
3 replies | 94 view(s)
February 24th, 2017,
11:28
MarkFL
replied to a thread
Linear Algebra Conditions
in
Linear and Abstract Algebra
There's no need to link to the commercial site you used. Thanks! :D
see more
3 replies | 99 view(s)
February 24th, 2017,
00:26
MarkFL
replied to a thread
Sequence question
in
Pre-Algebra and Algebra
Let's find the $p$th term. I think what I would do is set: \frac{n(n+1)}{2}=p Now solve for $n$... n(n+1)=2p
see more
1 replies | 58 view(s)
February 23rd, 2017,
22:15
MarkFL
replied to a thread
Physics 1-D Kinematics
in
Other Advanced Topics
Perhaps you meant how can we derive this formula. Let's begin with the definition of average acceleration: \overline{a}=\frac{\Delta v}{\Delta...
see more
6 replies | 103 view(s)
February 23rd, 2017,
20:43
MarkFL
replied to a thread [SOLVED]
A tank contains 200 gal of fresh water
in
Differential Equations
I made a mistake in my above post...the IVP should be: \displaystyle \d{F}{t}=2-\frac{5F}{4(50-t)} where $F(0)=0$. So, this leads to: ...
see more
7 replies | 125 view(s)
February 23rd, 2017,
16:33
MarkFL
replied to a thread [SOLVED]
A tank contains 200 gal of fresh water
in
Differential Equations
I would let $F(t)$ be the amount of fertilizer in the tank at time $t$. From the problem statement, we get the following IVP: ...
see more
7 replies | 125 view(s)
February 23rd, 2017,
14:31
MarkFL
replied to a thread
Physics 1-D Kinematics
in
Other Advanced Topics
I don't follow...it's already in the form we want to give us the acceleration. :D
see more
6 replies | 103 view(s)
February 23rd, 2017,
14:28
MarkFL
replied to a thread
Physics 1-D Kinematics
in
Other Advanced Topics
The kinematic formula you want is: \overline{a}=\frac{v_f^2-v_i^2}{2\Delta x}
see more
6 replies | 103 view(s)
February 23rd, 2017,
02:40
MarkFL
replied to a thread
New User Interface For Embedding Desmos Graphing Calculators In Your Posts
in
Announcements
Our goal is to make MHB stand out as much as we can from our competitors by offering features you just don't see anywhere else. If we were to package...
see more
3 replies | 128 view(s)
February 23rd, 2017,
02:35
MarkFL
replied to a thread
Tapatalk...
in
Chat Room
Personally, I don't think Tapatalk is ready for vBulletin, much less sites using $\LaTeX$. From what I've gathered, many vBulletin admins refuse to...
see more
4 replies | 94 view(s)
February 23rd, 2017,
01:29
MarkFL
replied to a thread
Tapatalk...
in
Chat Room
I'd be happy if Tapatalk didn't lazily bypass most vBulletin PHP plugin hooks. (Giggle)
see more
4 replies | 94 view(s)
February 22nd, 2017,
04:08
MarkFL
replied to a thread
242t.9.1.15 Use Euler's method to calculate the first three approximations
in
Calculus
Your solution to the given IVP isn't correct...we are given: \d{y}{x}=9x^8e^{-x^9} where y(0)=8 \int_{y(0)}^{y(x)}\,du=\int_0^x...
see more
1 replies | 66 view(s)
February 21st, 2017,
23:42
MarkFL
started a thread
New User Interface For Embedding Desmos Graphing Calculators In Your Posts
in
Announcements
Hello, MHB Community! (Wave) We are pleased to announce a new method for embedding Desmos calculators in your posts, which we hope you will find...
see more
3 replies | 128 view(s)
February 21st, 2017,
12:24
MarkFL
replied to a thread [SOLVED]
9.1.14 Use Euler's method to calculate
in
Calculus
Given: \d{y}{x}=f(x,y) Euler's method is the recursion: y_{n+1}\approx y_{n}+\Delta x\cdot f\left(x_n,y_n\right) Now, in the given...
see more
2 replies | 87 view(s)
More Activity
No More Results
No Recent Activity
About Wilmer
Basic Information
About Wilmer
Biography:
Retired, widower, grandfather...
Location:
Ottawa Ontario Canada
Interests:
Sports
Occupation:
Retired
Country Flag:
Canada
Signature
I'm a man of few words...but I use them often !
Statistics
Total Posts
Total Posts
165
Posts Per Day
0.09
Thanks Data
Thanks Given
14
Thanks Received
99
General Information
Last Activity
February 23rd, 2017
10:00
Last Visit
February 23rd, 2017 at 01:15
Last Post
December 30th, 2016 at 02:15
Join Date
March 19th, 2012
4
Friends
MarkFL
Online
Pessimist Singularitarian
mathbalarka
Offline
MHB Journeyman
Sudharaka
Offline
MHB Master
ZaidAlyafey
Offline
زيد اليافعي
Showing Friends 1 to 4 of 4
No results to show...