Math Section Of PCAT!

[Brandie28]

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It sounds like there are a lot of rate questions according to everyone. But I am not sure I know what you are talking about. What exactly are rate problems? Because I don't remember ever doing any and I have taken Calc 1 & 2...so can someone elaborate more on the rate problems? Thanks!!

 

[Transformer]

I didn't take the June PCAT exam but I did recently retake Calculus. Calculus Rate Problems involves finding the rate at which a certain variable changes with time.

For example, If I wanted to find the rate of change of Area (A) of a circle = pi*R^2. I would take the derivative of Area(A) of circle and find dA/dt = A'(t) = 2*pi*R

Hope that helps a little

 

[Farcus]

no they don't have a lot of cal rate problems, those take forever to do, simple rate problems can be.

If there person A build a house at rate of 3hour per house , person B build house rate at 7 hour per house. What is the time for them building together to build 3/4 of a house? Problems like those, I don't remember seeing calculus rate problems, i took it in january.

 

[Transformer]

Farcus, would the following be correct way to solve the rate problem you presented:

(7 + 3) / 2 = 5 hours working together to build 1 house

5 * (3/4) = 3.75 hours

Answer: It would take 3.75 hours or 3 hours and 45 minutes for person A and B working together to complete building 3/4 of the house

 

[Farcus]

If there person A build a house at rate of 3hour per house , person B build house rate at 7 hour per house. What is the time for them building together to build 3/4 of a house? Problems like those, I don't remember seeing calculus rate problems, i took it in january.

(3 * 7)/(3+7)= 2.1 per 1 house
2.1 * 3/4 = 1.575 hours.

The way to do these is (a * b)/(a+b) always work for rate problems like these. There are a few others.

Whos says Kaplan courses aren't worth the money 😀, and yes I'm almost 70% sure I saw 1 problem like this on math and a few other rate problems.

 

[mug3n]

It wasn't on either of the practice tests, nor is it on the June PCAT.

 

[Farcus]

yes, but can you tell me it wouldn't be on the next one? and can't deny that there aren't a lot of rate related problems on the math section on PCAT.

 

[sakigt]

The math section is you versus your ego.

No one is saying you cant solve the problem in front of you - but how long will it take you to do it?

If you look at a problem and cant solve it in a minute - move on. You WILL run out of time trying to be a hero and get a 100% on the math section.

 

[Brandie28]

Are the rate questions on the PCAT algebraic rate questions or relates rates from calculus?

 

[Farcus]

i think its mostly algraba ones.