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Re: Would you like to help?

I am reviewing my calculus and I stumbled over this forum just today by googling for some help on rate-of-change of an angle type word problems. We worked together on another virtual venue some time back. I am really glad to see that you have created this forum and I will try to help when I can. Che...
by jaybird0827
on Tue May 26, 2009 7:24 pm
 
Forum: Forum Rules & Guides
Topic: Would you like to help?
Replies: 4
Views: 12382

Airplane Angle Rate-of-Change Problem  TOPIC_SOLVED

This airplane is flying at 500 km/h in a straight direction at a constant 5000 m. \theta is the angle of elevation from a fixed point of observation. What is the rate of change of \theta when it is 30°? Required to answer in DMS/s and round to one decimal place. Solution: Drew the right triangle as ...
by jaybird0827
on Wed May 27, 2009 12:01 am
 
Forum: Calculus
Topic: Airplane Angle Rate-of-Change Problem
Replies: 5
Views: 4925

Re: Airplane Angle Rate-of-Change Problem  TOPIC_SOLVED

Eliz, Appreciate your attention to details. Hmm, let's see, "Low d high minus high d low, over the square of what's below") - tan(\theta)\,%20=\,%20\frac{h}{b} , And here's where I made my error - I swapped the "square of "what's below" with the square of what was ab...
by jaybird0827
on Fri May 29, 2009 7:35 pm
 
Forum: Calculus
Topic: Airplane Angle Rate-of-Change Problem
Replies: 5
Views: 4925

Re: Airplane Angle Rate-of-Change Problem  TOPIC_SOLVED

:oops: Wow, I must have been in "la la land". So, further corrections \frac{d\theta}{dt}\,%20=\,\frac{-100}{3}\,*\,\frac{3}{4} \frac{d\theta}{dt}\,%20=\,-25\,\frac{radians}{hr} \frac{-25}{hr}\,*\,\frac{180}{\pi}\,*\frac{hr}{60\,min}\,*\,\frac{min}{60\,s} =\,approx\,-0.3978873577\,\frac{\,d...
by jaybird0827
on Mon Jun 01, 2009 2:44 pm
 
Forum: Calculus
Topic: Airplane Angle Rate-of-Change Problem
Replies: 5
Views: 4925

Two Jets Separating at 872 mi/hr ... when?  TOPIC_SOLVED

A jet flying due north at 640 mi/hr passes over this town at noon. 15 minutes later another jet flying due west passes over the same town. The planes are flying at the same altitude. At what time will they be separating at 872 mi/hr? ( edited ) The answer is 1:15 p.m. I tried . I think I must be mis...
by jaybird0827
on Mon Jun 01, 2009 7:36 pm
 
Forum: Calculus
Topic: Two Jets Separating at 872 mi/hr ... when?
Replies: 2
Views: 1842

Re: Slope intercept  TOPIC_SOLVED

5. Give the slope-intercept form of the equation for the line on which these two points lie: (4, -2) and (3, 8) 5.1) We need to find the slope. m\,=\frac{y_2 - y_1}{x_2 - x_1} . Plug the y-coordinates and the x-coordinates into the formula. That would be either m\,=\frac{8\, -\, (-2)}{3\,-\...
by jaybird0827
on Mon Jun 01, 2009 7:53 pm
 
Forum: Beginning Algebra
Topic: Slope intercept form of line through (4, -2) and (3, 8)
Replies: 1
Views: 1623

Re: STATISTICS  TOPIC_SOLVED

A PIZZA PARLOR HAS A CHOICE OF 13 TOPPINGS FOR ITS PIZZAS. fROM THESE 13 TOPPINGS MANY DIFFERENT 2-TOPPINGS PIZZAS CAN BE ORDERD? aSSUME THAT THE ORDER IN WHICH TOPPINGS ARE LISTED DOES NOT MATTER. This is a simple problem in combinations. You want to select 2 toppings out of 13 available. So it's ...
by jaybird0827
on Mon Jun 01, 2009 8:05 pm
 
Forum: Discrete Math
Topic: Statistics: 13 toppings, how many 2-topping pizzas possible?
Replies: 1
Views: 1579

Re: FUNCTIONS  TOPIC_SOLVED

Which of the following are functions? The last two problems, i.e., b & c, are multi part relations consider all parts when determining whether or not these relations are functions. Explain your reasoning for a, b, and c. Iam thinking for problem (a) that it is a FUNCTION because the value could...
by jaybird0827
on Tue Jun 02, 2009 3:53 pm
 
Forum: Beginning Algebra
Topic: Which of the following are functions? f=x+5, f=3 if x>2,
Replies: 3
Views: 2579

Re: Which of the following are functions? f=x+5, f=3 if x>2,  TOPIC_SOLVED

Subject: Which of the following are functions? f=x+5, f=3 if x>2, Which of the following are functions? The last two problems, i.e., b & c, are multi part relations consider all parts when determining whether or not these relations are functions. Explain your reasoning for a, b, and c. Iam thin...
by jaybird0827
on Tue Jun 02, 2009 9:04 pm
 
Forum: Beginning Algebra
Topic: Which of the following are functions? f=x+5, f=3 if x>2,
Replies: 3
Views: 2579

Re: Two Jets Separating at 872 mi/hr ... when?  TOPIC_SOLVED

Eliz, Thanks for taking a look. I almost gave up on this, but I just couldn't. I decided to experiment by creating a similar problem in which the rates were known, the time was known, and the requirement was to find the rate at which the two jets were separating at a given time. I contrived it to wo...
by jaybird0827
on Thu Jun 04, 2009 1:42 am
 
Forum: Calculus
Topic: Two Jets Separating at 872 mi/hr ... when?
Replies: 2
Views: 1842
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