Math Is Fun Forum

Bob

Administrator

Registered: 2010-06-20

Posts: 10,140

Re: Area of Squares

What is Q10?

10. What is the total grazing area the goat can reach?

B

---

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

owenflo

Member

Registered: 2014-07-21

Posts: 115

Re: Area of Squares

I know but i cannot figure out the answer

owenflo

Member

Registered: 2014-07-21

Posts: 115

Re: Area of Squares

I need the correct values so I can add 6,7,8 and subtract 9...

Bob

Administrator

Registered: 2010-06-20

Posts: 10,140

Re: Area of Squares

In post 142 you had this:

1875 PI is 5890.486

5890.486225+706.858+706.858-75= 7229.312

It seems your teacher is happy with all of those values except 75, which is too low.  The value that zee-f used was accepted.  You just need to read earlier posts in this thread.  Are you having difficulty viewing these?

Bob

---

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

owenflo

Member

Registered: 2014-07-21

Posts: 115

Re: Area of Squares

What did zee-f use?

owenflo

Member

Registered: 2014-07-21

Posts: 115

Re: Area of Squares

Yes i am having difficulty viewing these. i really need to finish this lesson, i have been stuck for too long

owenflo

Member

Registered: 2014-07-21

Posts: 115

Re: Area of Squares

Do you subtract 95?

Bob

Administrator

Registered: 2010-06-20

Posts: 10,140

Re: Area of Squares

Good idea!!

Bob

---

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

owenflo

Member

Registered: 2014-07-21

Posts: 115

Re: Area of Squares

Okay so if i subtract 95, then what?

Bob

Administrator

Registered: 2010-06-20

Posts: 10,140

Re: Area of Squares

You send in your answer. 

Bob

---

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

owenflo

Member

Registered: 2014-07-21

Posts: 115

Re: Area of Squares

My teacher said..

You DO subtract the overlap.  But it doesn't equal 95.  Your own calculations did not produce "95" as the overlap.

Bob

Administrator

Registered: 2010-06-20

Posts: 10,140

Re: Area of Squares

hi owenflo

I'm sorry to hear that your teacher still hasn't accepted your answer.  It is not the first time that I have encountered CompuHigh teachers who are unable to credit correct answers. 

You DO subtract the overlap.  But it doesn't equal 95.  Your own calculations did not produce "95" as the overlap.

I am at a loss to understand this statement.  Here is what you posted:

Q9
3/4*10^2*PI

3/4*100*PI

75(PI)

area 75, looks like it almost makes a square shape.

And the question says:

If there are regions you can't find the area of, provide as good an estimate as you can.

Now the bit I have highlighted in red appears to be a calculation for a part of a circle that you did not need to work out.  It's not wrong, but you didn't need to calculate it, so the sensible thing for any teacher to do would be to ignore it.

The bit not in red is an estimate not a calculation.  The question asks for an estimate.  It is a little low and your teacher has said this.  Then you made a fresh estimate of 95.  You did no calculations to get this figure; just looked at the area and made an estimate.

I have now computed the overlap accurately using integral calculus and that estimate is extremely close to the correct value; certainly acceptable within the limits of the accuracy of the  question.  So why is it not being accepted?

As you don't want to be accused of cheating I am uncertain what to advise next.  You could  tell your teacher that you are not making a calculation, just making an estimate, so what is wrong with that value?  If you want to risk it, you could also say that you have asked a mathematician to use advanced maths to make an accurate calculation and that person has said that your estimate is very close to the accurate answer.  That person has not told you what value they got deliberately so you cannot be accused of cheating!

If your teacher wants confirmation of my calculations I am happy to enter into a private email conversation with him/her.  Ask if it is alright for you to message me with the teacher's email address.

Bob

---

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

owenflo

Member

Registered: 2014-07-21

Posts: 115

Re: Area of Squares

My teacher said

I am not accusing you of cheating, in any way.   On July 31, you did a precise calculation of the overlap.  I am merely asking you to use that correct value in your calculations for problem #10.

owenflo

Member

Registered: 2014-07-21

Posts: 115

Re: Area of Squares

#10

I added number from questions 6,7,8 and subtracted from number 9.

1875(PI)+225(PI)+225(PI) 75

2325(PI) 75

7304.202 75

7229.202 answer

I DID THAT ON JULY 31

Bob

Administrator

Registered: 2010-06-20

Posts: 10,140

Re: Area of Squares

The minus signs are not showing in your post.

I assume the teacher means you swap 95 for 75.

Bob

---

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

owenflo

Member

Registered: 2014-07-21

Posts: 115

Re: Area of Squares

So

1875(pi)+225(pi)+225(pi)-95

= 7209.20292

owenflo

Member

Registered: 2014-07-21

Posts: 115

Re: Area of Squares

On July 31, you did not calculate "95" as the overlap.  You calculated "75 pi."

MY teacher said that

Bob

Administrator

Registered: 2010-06-20

Posts: 10,140

Re: Area of Squares

Why does your teacher keep going back to 31st July?  You submitted a wrong answer and you are being asked to correct it.  You have done that.  Surely your teacher should be congratulating you for your success.

Ask your teacher to accept your post 166 answer as your final attempt.  If he/she won't do that, ask the administrators of CompuHigh for another teacher.

Bob

---

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

owenflo

Member

Registered: 2014-07-21

Posts: 115

Re: Area of Squares

I told her I thought we corrected the answer. I'll let you know what she says.

owenflo

Member

Registered: 2014-07-21

Posts: 115

Re: Area of Squares

She said
You CORRECTLY calculated 75 pi as the overlap, and you should include that value when you answer problem #10.

owenflo

Member

Registered: 2014-07-21

Posts: 115

Re: Area of Squares

Please help fast so i can go onto the next lesson!

Bob

Administrator

Registered: 2010-06-20

Posts: 10,140

Re: Area of Squares

She said
You CORRECTLY calculated 75 pi as the overlap, and you should include that value when you answer problem #10.

Really!!!  OK.  Let's get the marks.  Submit that value and she will have to award you full marks.

Note to others reading this thread.  Some on-line courses are good; and some are not.  If you are thinking about paying a large sum for an on-line course, be careful to choose the right one.  I'd say more but some on-line courses may have better lawyers than I can afford! 

Bob

---

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

owenflo

Member

Registered: 2014-07-21

Posts: 115

Re: Area of Squares

How do I do this with 75?

Bob

Administrator

Registered: 2010-06-20

Posts: 10,140

Re: Area of Squares

apparently she wants:

Q9 75pi

Q10 1875(pi)+225(pi)+225(pi)-75pi

I disagree but let's see what she makes of that.

Bob

---

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

owenflo

Member

Registered: 2014-07-21

Posts: 115

Re: Area of Squares

SHE SAID
Please simplify your answer.  Don't forget the unit of measure, too, please.

PLEASE HELP