.
. centre de ressources dilemmes et doutes le visage humain de mathématiques Qui sommes-nous Problème de mois activités de promotion babillard
Centrale des maths - centraledesmaths.uregina.ca
Dilemmes & doutes
« D & D »
. .
topic card  

Sujet:

tiles

liste de
sujets
. .
nouvelle recherche

25 articles trouvés pour ce sujet.
 
Page
1/1
4" x 4" square tiles 2019-09-18
Jill pose la question :
how many 4" x 4" square tiles would I need for 50 square feet?
Penny Nom lui répond.
Tiling a floor 2016-03-05
joanne pose la question :
How many floor tiles 20x20 inch do I need for area of 8x 12 ft.?
Penny Nom lui répond.
Tiling a room 2015-02-16
Owen pose la question :
nicolas room is 56m2 she wants to put tiles down which are 50cm by 50cm each cost £4 how much money will she spend
Penny Nom lui répond.
Tiling a floor 2013-03-18
whitley pose la question :
Question from Whitley, a student:

How many square feet of tile do you need to cover the floor of a room that is 20ft, 25ft, 15ft, 20ft, 5ft, and 5ft

I made a replica of the floor

Penny Nom lui répond.
An electron in a TV tube 2013-02-15
anu pose la question :
an electron in a TV tube is beamed horizontally at a speed of (50^6) m/sec. towards the face of a tube 40 cm away about how far will the electron drop before it hits? no information has been provided of initial height from where it is beamed.
Robert Dawson lui répond.
Percentiles 2012-10-17
Kenneth pose la question :
Question from Kenneth:

Hello:

What is a common calculation used to determine percentiles?

For example, five employees have the following salaries:

Office worker 1 - $25,000

Office worker 2 - $27,000

Office worker 3 - $30,000

Office worker 4 - $32,000

Office worker 5 - $35,000

What is the percentile rank of office worker 3 who earns $30,000?

Here's what I know: Add the number of salaries. Total: 5

Add the smallest number of salaries less than $30,000. There are two.

Now, divide 2 by 5 and multiply by 100. 2/5 * 100 = 40

I think the office worker making $30,000 is in the 40th percentile. and I'm not sure what this ranking indicates.

I thank you for any helpful reply and or different calculation.

Harley Weston lui répond.
Tiling a floor 2012-02-27
jamie pose la question :
how many 16in by 16in blocks would it take to cover a 16ft by 16ft floor?
Penny Nom lui répond.
Romeo throws a pebble at Juliet's wondow 2011-08-22
Natalie pose la question :
There is a picture of Romeo trying to attract Juliet's attention without her nurse who is in a downstairs room, noticing. he stands 10m from the house and lobs a small pebble at her bedroom window (3.5m high). Romeo throws the pebble from a height of 1m with a speed of 11.5m/s at an angle of 60degrees to the horizontal. I have already found that it take 1.74seconds to reach the window and that it does in fact hit Juliet's window however i cannot work out the speed of the pebble when it hits the window! The answer is 9.12m/s but I cannot reach this answer. Hope you can help me :)
Robert Dawson lui répond.
Tiles for a back splash 2011-06-04
Catherine pose la question :
How man 3 11/16 tiles do I need for 28 square foot for a back splash
Penny Nom lui répond.
Why use percentiles? 2011-04-29
Kenneth pose la question :
I need some clarification regarding the word "percentile."

Here is an example and what I know: If an investor had twenty stocks in his portfolio and five of those stocks paid an annual dividend of $200.00 or more, the five stocks are in the 25 percentile.

Why is this word necessary? If my example and explanation is correct, why not simply indicate that 25% of his stocks paid an annual dividend of $200.00 or more?

Penny Nom lui répond.
Tiles on a bedroom floor 2010-10-07
Rochelle pose la question :
John's bedroom floor is square in shape. He used 625 tiles, with a side length of 200 mm, to tile the whole floor. Calculate the area and dimensions of the bedroom
Penny Nom lui répond.
Tiling a floor 2010-05-03
guadalupe pose la question :
how many 16 x 16 inch square tiles fit into a 10 x 10 foot space?
Harley Weston lui répond.
Tiles 2010-04-25
Pat pose la question :
how many 6 inch tiles will I need to purchase for an area that is currently covered with 351 4 inch by 4 inch tiles. Each box of 6 inch tiles states it contains 16 pieces and covers 4 square feet.
Penny Nom lui répond.
Tiling a floor 2010-03-31
shane pose la question :
a floor in a house is 12'6" in width and 10'4" in length. Tiling the floor with each tile 5" on each side. First express the square footage into an improper fraction. Second express the area of each tile in square feet. Third how many tiles needed to tile the floor. Fourth explain how answers relate to real world
Harley Weston lui répond.
How many 20"X20" tiles do I need to cover 90 sq. ft? 2010-03-23
Karen pose la question :
How many 20"X20" tiles do I need to cover 90 sq. ft.
Penny Nom lui répond.
How many 4x4 tiles would I need for 10 sq ft? 2010-01-04
Chris pose la question :
how many 4x4 tiles would I need for 10 sq ft
Robert Dawson lui répond.
Percentiles 2009-03-21
Shawn pose la question :
For a normal distribution of u=654.00 and o=138.00.
What is the percentile rank for X=426?

Harley Weston lui répond.
Tiles on a basement floor 2008-01-31
ORIETTA pose la question :
I have a basement 1000 sq ft I want to purchase tile that are 18x18inches and they are charging 4.15 sq ft how much would it cost since I will need less tiles to cover the area since it's not 12X12
Penny Nom lui répond.
Upper Quartiles 2007-01-26
Jamie pose la question :
I see you have a question about Q3 with even numbers but what about odd numbers? I have a problem with 19 numbers 36,45,49,53,55,56,59,61,62,65,67,70,75,81,82,86,89,94,99. Is there anyway the answer could be 81.5 because every time I do it I get 82 and my teacher tells me that is wrong. So in conclusion how do you do it?
Penny Nom lui répond.
Tiles arranged in rows 2007-01-02
Ann pose la question :
Some tiles are arranged in rows so that the number of tiles in each row is 8 more than the number of rows. The same number of tiles can be arranged in 3 more rows than the first pattern with 16 tiles in each row. Find the total number of tiles.
Stephen La Rocque lui répond.
Outliers in a box and whisker plot 2006-02-19
A student pose la question :
i need help on determining if their is an outlier...i know how to find the median and the lower quartile and the upper quartile..but i don't understand about the outliers....please tell me if their is an outlier in this problem....the numbers are...63,88,89,89,95,98,99,99,100,100
Penny Nom lui répond.
How many tiles do I need? 2005-07-20
Jeannette pose la question :
I am putting up backsplash tile in my kitchen and I need to know how many tiles I would need to use for about 45 square feet using 4x4 tiles.
Penny Nom lui répond.
Percentiles 2004-08-15
Gary pose la question :
Table 1 Selected percentiles for family income in the US in 1992 1 $1,300 10 $10,200 25 $20,100 50 $36,800 75 $58,100 90 $85,000 99 $151,800

Q. The percentage of families in Table 1 with incomes below $58,100 was about?

Penny Nom lui répond.
A square of tiles 2002-08-30
Rosa pose la question :
How do I go about finding a formula for the number of tiles I would need to add to an arbitrary square to get to the next sized square?
Penny Nom lui répond.
Box and Whisker plots 2001-11-19
Rod pose la question :
In our Prealgebra course, we have been studying Box and Whisker plots. Recently, we learned how to decide whether a data point is an outlier or not. The book (Math Thematics, McDougall Littell) gave a process by which we find the interquartile range, then multiply by 1.5. We add this number to the upper quartile, and any points above this are considered to be outliers. We also subtract the number from the lower quartile for the same effect.

My question: where does this 1.5 originate? Is this the standard for locating outliers, or can we choose any number (that seems reasonable, like 2 or 1.8 for example) to multiply with the Interquartile range? If it is a standard, were outliers simply defined via this process, or did statisticians use empirical evidence to suggest that 1.5 is somehow optimal for deciding whether data points are valid or not?


Penny Nom lui répond.
 
Page
1/1

 

 


Centrale des maths reçoit une aide financière de l’Université de Regina et de The Pacific Institute for the Mathematical Sciences.

CMS
.

 

accueil centre de ressources accueil Société mathématique du Canada l'Université de Regina PIMS