# Sargent Park 8-16 Math

## Saturday, April 29, 2006

## Wednesday, April 26, 2006

### surface area and volume questions by laramae

so late... oh well got too excited with the new program and forgot i could have done it right here. hah. im stupid. sorry mr. harbeck its so late .. just click on it to go on another window and when you're in the window with the picture alone, click on the picture so you can actually read the text : D

### scribe post by laramae } april 26 '06

Lowest Terms

Today april 26, 06 in math class we did the folding out page thing. you know hamburger hamburger hotdog then in threes. its the thing again that we do every unit but i wasn't assigned to do the whole thing so that's only section 3 box 1 all the way down staying on section 3 each square. We found out how to simplify fractions into lowest terms. So incase you weren't here you can copy all of it down. And remember thats section 3 going all the way down not left to right cuz you know mr.harbeck changed his ways. its been long since i did a scribe post february ? .. i dont know what else to say : | oh yeah i have to chosse the next scribe right ?? or is renee choosing the next scribe ? well i'll just decide in class. bye : D

--lara.mae.

## Tuesday, April 25, 2006

### darie scribe a25 HAPPY BDAY DHONA! haha

[8] HAPPY BIRTHDAY DHONA! HAPPY BIRTHDAY DHONA! HAPPY BIIIIIRTHDAAAY, HAPPY BIIRTHDAY, HAPPY BIRTHDAY DHONA! ...ok..now that's all gone...i'll do my scribing now....

### Tuesday, April 25 Scribe (:

Today we learned about parts of a fraction. We learned that there is the denominator, and numerator. We learned that the denominator tells you how many equal sized parts make up the whole. It is the bottem number in a fraction. The denominator tells you how large or small the parts are.

We also learned that the numerator is the top number. It tells you how many parts of the whole you have. When the numerator and denominator are the same (4/4) you have 1 whole. When the numerator is larger then the denominator it is an improper fraction. You have more then one.

ookay, thats all i have, enjoy :)

## Thursday, April 20, 2006

### Surface Area and Volume Questions

Problem 1 (Easy)

1. How much cement is needed to build a sidewalk that is one thousand, one hundred twenty metres long, four metres wide and fifty centimetres thick? Round your answer to the nearest cubic metre.

My answer:

Okay..first of all we must know the measurments which are, 1120 m, .5 cm and 4 m.

Then we multiply all the numbers together.

1120x.5x4= 2240 m3

So, you need 2240 m3 of cement to build the sidewalk.

Now that's done. On with the next question. Well, not number 2 cause i don't understand it, so the other OTHER question.

Problem 3 (easy)

3. If you have five 5 cm by 5 cm x 5 cm aluminum cubes and superglue them together in a row, what is the surface area of the resulting shape made by the five cubes?

My answer:

Well, first you have to multiply the numbers together.

5 x 5= 25 x 2= 50

50 x 5= 250

50 x 5=250

then you have to add them all together.

50+250+250=550 cm2

So the total surface area is 550 cm2

### Marielou's Surface Area and Volume Problems

hope this isn't too late!!!! (ill post it anyways =)

***i know my picture isn't accurate with the #'s given but.... i hope you get what i mean**

**Problem 1 (Easy)**

1. How much cement is needed to build a sidewalk that is one thousand, one hundred twenty metres long, four metres wide and fifty centimetres thick? Round your answer to the nearest cubic metre.

to figues out this question you would have to find the volume

(oh yea.. color coded it so it would be easier)

to find volume you multiply length(L) times width(W) times height(H)

LxWxH

= 1120x4x0.5

= 2240 m3

so the answer is

**2240 m3**(of cement?)

**Problem 3 (easy)**

3. If you have five 5 cm by 5 cm x 5 cm aluminum cubes and superglue them together in a row, what is the surface area of the resulting shape made by the five cubes?

hmmm... ill post a picture =)

to finde the TSA you have to figure out the area of all the sides of your rectangular prism. since your width is made up of 5, 5cm squares, you could add them you together so that you only have one number for your width instead of 5.

so it would be: 5cm + 5cm + 5cm + 5cm + 5cm= 25cm

so the value of your width is now just one number 25 cm.

now to solve! (ill post another picture)

now to add all of the totals together:

250 cm2 + 250 cm2 + 50 cm2

---------

550 cm2

so, the TSA is 550 cm2 (i hope?)

ohkays so now im done! hope i did it right?...... wells that it i guess!! =)

## Wednesday, April 19, 2006

### volume and surface area questions...

Problem 1

How much cement is needed to build a sidewalk that is one thousand, one hundred twenty metres long, four metres wide and fifty centimetres thick? Round your answer to the nearest cubic metre.

v= length x width x height

= 1120 x .5

= 560 x 4

= 2240 m³

Problem 3

If you have five 5 cm by 5 cm x 5 cm aluminum cubes and superglue them together in a row, what is the surface area of the resulting shape made by the five cubes?

5 x 5 = 25

25 x 5 = 125

25 x 5 = 125

Multiply each by TWO since there are six sides.

25(2) = 50cm²

125(2) = 250cm²

125(2) = 250 cm²

Add your answers and you’ll find the surface area.

50+ 250 +250 = 550cm²

- lynelpobre.

### darie's volume and surface area questions

**Problem 1. (easy)**

1. How much cement is needed to build a sidewalk that is one thousand, one hundred twenty metres long, four metres wide and fifty centimetres thick? Round your answer to the nearest cubic metre.

just need to multiply all the numbers together.

***since it's cm and not meters, you need to divided 50 by 100. and that'll give you 0.5 .**

1120 x 4 x 0.5 = 2240 m2

so you need 2240 m2 t build the sidewalk.

------------------------------------------------------------------------------------------------

**Problem 2 (harder)**

2. Mr. Bloop has a cylindrical water tank on his farm. It is three metres long and 60 centimetres in diameter. Water flows out a valve in the bottom of the tank at a rate of 0.8 cubic metres per second. How long will it take the tank to empty?

...i don't get it...

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**Problem 3 (easy)**

3. If you have five 5 cm by 5 cm x 5 cm aluminum cubes and superglue them together in a row, what is the surface area of the resulting shape made by the five cubes?

5 x 5 = 25 } one side of one cube

25 x 5 = 125 cm 2 } six sides of one cube

125 x 5 = 625 cm 2 } all the sides.

since all the sides are going to be put together you have to take away 4 sides.

so it'll be

4 x 25 = 100

625 - 100 = 525 cm2

**surface area is 525 cm2**

## Tuesday, April 18, 2006

### Volume and Surface Area Questions

1.How much cement is needed to build a sidewalk that is one thousand, one hundred twenty metres long, four metres wide and fifty centimetres thick? Round your answer to the nearest cubic metre.

Ok..first of all you check the measurement and the type of measurement .. in this case it's metre..don't forget that!

Basically in this case you just need to multiply all the numbers together....

1120 X 4 X .5

btw... its .5 because in the question it says 50 CM not M so i must divide by 100.... 50/100 = .5

anyways: 1120 X 4 X .5 = 1125

but because a rectangular prism has 6 sides all together...we must multiply this by 2...

1125(2)= 2250 is the answer to this world problem

*remember..... METRES is the type of measurement!*

*so it is: 2250 m3*

-------------------------------------------------------------------------------------------------------------------------------------------------------------------------

3. If you have five 5 cm by 5 cm x 5 cm aluminum cubes and superglue them together in a row, what is the surface area of the resulting shape made by the five cubes?

I must remember the fact that they are all IN A ROW and so its not just the normal thing like...5X5= 25 (2) and so on....

It should be something like: 5 X 25 = 125 (2) = 250

: 5 X 5 = 25 (2) = 50

: 5 X 25 = 125 (2) = 250

add them all up equals: 550 cm2

i hope that's

*right!*

*-dandan =)*### Volume and Surface area quetions

1. How much cement is needed to build a sidewalk that is one thousand, one hundred twenty metres long, four metres wide and fifty centimetres thick? Round your answer to the nearest cubic metre.

1120 x 4 x .5 = 2240m3

2240m3 is the amount of cement you need.

But if you're finding surface area, here's how to do it.

1120 x 4 = 4480m x 2 = 8960m

1120 x .5 = 560 x 2 = 1120m

.5 x 4 = 1m x 2 = 2m

8960 + 1120 + 2 = 10082m2

*right? =/*3. If you have five 5 cm by 5 cm x 5 cm aluminum cubes and superglue them together in a row, what is the surface area of the resulting shape made by the five cubes?

First you have to put the five cubes together. So that means that you'll have one long rectangle. The base will be 5cm long. The height will be 25cm long and the width will be 5 cm long.

5 x 5 = 25 x 2 = 50cm

25 x 5 = 125 x 2 = 250cm

25 x 5 = 125 x 2 = 250cm

50 + 250 +250 = 550cm2

So the total surface area is 550 cm2

**annalynaniciete ; nannalyn**

### Surface Area & Volume Questions`

**Problem 2 (harder)**2. Mr. Bloop has a cylindrical water tank on his farm. It is three metres long and 60 centimetres in diameter. Water flows out a valve in the bottom of the tank at a rate of 0.8 cubic metres per second. How long will it take the tank to empty?

Well, there are 100 cm in a metre. To start off, you find the volume of the cylinder by finding the circumfrence. You mulitply 3.14 by 60 which gives you 188.4.

Then you multiply that by 300 centimetres which will give you 56520. Since it leaks 0.8 cubic metres every second. Well, it leaks 48 cubic metres a minute (60 x 0.8). Since there is 60 minutes in an hour I multiplied 60 by 48 to get 2880.

The tank leaks 2880 cubic metres every hour. So I subtracted 2880 from 56520 to get 53640. Then you keep subtracting until you get down to zero.

After long CALCULATOR work. It takes 19 hours, 37 minutes and 19 seconds for the tank to become empty. I think that is right.

**Problem 3 (easy)**3. If you have five 5 cm by 5 cm x 5 cm aluminum cubes and superglue them together in a row, what is the surface area of the resulting shape made by the five cubes?

You start off by finding the surface area for each cube. There are six sides and each side is 25 cm2. You multiply 25 by 6 to get 150. Since the sides are going to be glued you are going to have to be aware that some sides don't count in the total meaurement. The three cubes in the middle are each 100 cm2 cause TWO sides of the cubes are not included. The end cubes are 125 cm2 cause each cube has ONE side not included.

Add up the total areas : 125 + 100 + 100 + 100 + 125 = 550 cm2

Total surface area of the cube chain is 550 cm2

Blah.. Hope they are right

-dhonagarcia

## Wednesday, April 12, 2006

### Jp's Scribe

JP sent this to me...

today, we learned about cylinders, to figure out the area, you must find the area of the base then mulitiply it by 2.

I think he is missing some information about the surface area of cylinders. Would anyone like to repost his scribe or add to this in the comments???

Help JP he is such a nice guy.

## Tuesday, April 11, 2006

### march eleven, scribe helen

uhhh leets see for those who weren't here, this is what we did today (: haha sorry if this doesn't make sense i don't really get it etheir haha

*umm we learned how to find the volume of a rectangular solid.*

hmm i'll try to break it down in steps

1) To find the volume of a rectangular solid you have to find the area of it's base.

2)To find the area of it's base you multiply length by width.

3) So far you have your area of it's base... so you take that base and multiply it by the rectangular solid's height.

**there's the volume!**

here's an example -

**Oh yeah we learned how to draw a rectangular prism (:**

- helen kh-chou : D

### research director; dhona`

In class, we learned about the volume of a rectangular prism. The formula for finding volume is simple: V = L x W x H.

The first site is a rectangular prism calculator. It helps show how to calculate the volume. It also shows the formula that you can use.

The second site shows formulas and lets you create the shape and it will caluculate the volume.

http://argyll.epsb.ca/jreed/math9/strand3/3106.htm

http://www.1728.com/recsolid.htm

I hope these sites help.

## Monday, April 10, 2006

### jeffs math thinggy

So today for math which was last period we learned how to calculate the surface area of a cylinder. To do this first you have to figure out what the formula is for the circle which is pR2 which is pie time radius squared. for example the radius of a circle was 2 so you would do 3.14 x 2 x 2 which is 3.14 x 4 then you get an answer of 12.56. Then you do your rectangles and the formula for that is circumference time hight or p x d. then you go 3.14 x 4 where u get 12.56 then you x that by the hight which would be 8 where u get 100.48 . Then you add all ur calculation which is 12.56 + 12.56 + 100.48 where you get an answer of 125.60 cm2 which is your area =)

http://www.aaamath.com/g79-surface-area-cylinder.html

web siight thingy lol iight im out pc

### annalyns research thingeemabober

to find an are of a circle is very easy . well you just need to knwo this simple formula which is pR2 ---> pi x radius squared . for example you have a circle w/ a radius of 4cm . so then you multiply 3.14 x 4 x 4 because its squared (dont multiply 4x2!) and you get an answer of 50.24cm2 and dont forget the squared sign .. yea .. here's the site thingee

http://www.aaamath.com/geo612-area-circle.html

yeah .. its a cool site .. and yea .. thats all im out