873 Math (2010): scribepost

Showing posts with label scribepost. Show all posts

Tuesday, May 17, 2011

Emily's Linear Relation's Scribe Post

Textbook page 337 questions 1-5:

1. Tell whether you think it is reasonable to have points between the ones on each graph. Explain your answer.

I do not think it is reasonable to have points between the ones on each graph because it would confuse me with all of the information on the one graph.

2. Draw a graph of a linear relation. Use integer values only. Label your graph. Write a brief description that matches the information on your graph.

Each container of yogurt costs $2, so the value increases by 2 each time (y axis) you have another container of yogurt. (x axis)

3. Use an example to show one way that a graph and a table of values are different and one way that they are similar.

Similarity- Both the graph and the chart can show the same concept. (ex. each carton of milk costs $2.) You also have to label both a graph and a chart.

Difference- On a graph you have to label each axis (x,y) and show each point on a line on the graph. For a chart all you have to do is provide the data of each point and label the two sections x(____________ ) and y(____________.) (ex. x (cost of milk,) y (number of milk cartons.)

4. The graph shows the increase in total height for each step of a staircase.

a) Describe patterns you see on the graph.

- the graph provides data on the Total Height of Stairs. One step is 20cm high, two steps are 40cm high, three steps are 60cm high, and four steps are 80cm high.

-the points appear to lie in a straight line. The graph shows a linear relation.

-the graph shows that to move from one point to the next you have to move one unit horizontally and one unit vertically.

b) Make a table of values from the graph.

c) If the pattern continues, what is the total height on step 10?

If the pattern continues the total height of 10 steps would be 200cm.

5. The graph shows the maximum number of students allowed on a field trip based on the number of teachers available to supervise.
a) Describe three patterns on the graph.

- the graph provides data on the Field Trip Supervision.

-the points appear to lie in a straight line. The graph shows a linear relation.

- the graph shows that to move from one point to the next you have to move one unit horizontally and one unit vertically.

b) Make a table of values from the graph.

c) If there are eight teachers available for a field trip, what is the maximum number of students who can go?

If there are eight teachers available for a field trip the maximum amount of students that could go would be 48.

Here is a LINK that may help you with linear relations.

Thursday, February 17, 2011

Math Textbook pages 250-253 #3,7,9,11,15

3.
a) V=Area of Base x h
V= 15cm2 x 4cm
V= 60cm3
b) V=Area of Base x h
V= 18cm2 x 12cm
V= 216cm3
c) V=Area of Base x h
V= 96cm2 x 20cm
V= 1920cm3

7. a) V/Area of Base = h
32cm3/8cm2 = h
4cm = h

b) V/Area of Base = h
35cm3/5cm2 = h
7cm = h

c) V/Area of Base = h
36cm3/9cm2 = h
4cm = h
9.
11. V= area of base x h

V= 10.4cm2 x 9
V= 93.6cm3

15. I'm not sure if I got this question right.
Area of base x h = V
615m2 x 44.5 m = 27367.5m3
425m3 / 27367.5m3 = 0.015529368%
0.015529368 x 100 = 1.5529368%
= 1.6%

Brandon's Text Book Volume Scribe

From the textbook, I had to do pages 260-261 numbers 11,16,17.
Here's what I did.

1)Copy and complete the following table.

the 700 is supposed to be 1200, sorry for the mistake.

a) So this is what I did. I needed to find the height for the first one so I divided 70 by 7 and I got 10
then I divided 10 by 2 and got 5.

b)For the second one I did the same thing 1080/12 = 90, 90/10 = 9 12x9x10 = 1080

c) 1200/5 = 240, 240/ 15 = 16

16)Cindy’s aquarium stands 75 cm tall and
has a base that measures 1.2 m × 80 cm.
At one point during the initial filling, the
aquarium has a 12-cm depth of water in
it. Cindy needs to fill it to 15 cm from the
top before she adds the fish. Draw a
diagram and label the dimensions of the
aquarium. Determine how much more
water Cindy must add before she puts in
the fish.

v= l.w.h
v=75cm.80cm.12cm
v=72,000 cm3

17) contractor is excavating a rectangular
hole 10 m × 12 m × 3 m to pour the
foundation for a house. A dump truck
with a capacity of 9 m3 is used to haul
away the excavated soil. How many trips
does the truck need to make?

v= l.w.h
v=10mx12mx3m
v=360
360/9= 40

The truck made 40 trips

Colleen's Volume Scribe

Textbook. Page: 258-259 #4,5,6.

4) Determine the volume of each triangular prism.

5) What is the volume of each rectangular prism?

6)Determine the volume of each cube.

Cylinder Volume and Volume Problems

area of base x height

r= d/2r
r= 45/2=22.5
r=22.5cm

a= pi.r^2
a= 3.14 x 22.5 x 22.5
a= 1589.625cm^2

v= 1589.625cm^2 x 90cm
v= 143066.25

One crate will be enough. the volume of the crate is 63m^3 and the volume of the boxes is 50m^3

Math Textbook Pg 250-253 #2,5,8,10

Jennily's Volume Post # 2,5,8,10

No it doesn't matter.

For example look at these two rectangular prism.

V= area of base x height

V= 50cm x 15cm

V= 750cm

V= area of base x height

V= 75cm x 10cm

V=750cm

You see they are both the same.

LxWxH

4cm x 3cm = 12cm

12cm² x 5cm = 60cm³

LxWxH

5cm x 3cm = 15cm

15cm² x 4 = 60cm³

LxWxH

20cm x 6cm = 120cm

120cm² x 8cm = 960cm

LxWxH

8cm x 6cm = 48cm

48cm² x 20 = 960cm³

So, mainly 1cm cube would look like this:

So if you were to make a base of fifteen cm cube it would look something like this:

The top of this layer should be 15cm² so we would use that as our base.

Since the prism is made up of 5 layers of the 15 cm cubes then i will be using that as my height.

V= area of base x height
V= 15cm² x 5cm
V=75cm³

Even if the wording is different it's basically just asking for the volume.

V= area of base x height
V= 1250cm² x 100cm
V= 125 000cm³

Cylinder Volume and Volume Problems
7.3

A)
V= π x r x r x h
V= (3.14 x 5 x 5) x 23
78.5cm ^2 x 23
V= 1805.5cm^3

B)
V= π x r x r x h
V= (3.14 x 14 x 14) x 12
615.44cm^2 x 12
V= 7385.28cm^3

C)
V= π x r x r x h
V= (3.14 x 0.5 x 0.5) x 1.5
0.785m^2 x 1.5
V= 1.1775m^3

7.4

A) Yes, He has enough small prism. If he uses 4 for the base and 4 for the height he will have enough.
B)
b x h / 2 x h
5.6 x 6.8 / 2 = 19.04m ^2
19.04m^2 x 1.18 = 22.4672m^ 3

Wednesday, February 16, 2011

Angelique's Homework Book Volume Scribe

From the homework book, I did questions 4, 6, and 8 on pages 80-81

For number 6, I solved the problems two different ways.

Here is a link that you might want to look at for some help on volume.

Here is a video that helps you learn more about volume.

Tuesday, February 15, 2011

Christian's HWB Post

Pages: 78-79

Questions: 5, 8 and 9

5. What is the volume of a right prism that has a base with an area of 15cm2 and a height of 7cm?

V = 15cm2 x 7cm

V = 105cm3

7. Calculate the height of each rectangluar prism.

a) 63cm3 ÷ 9cm2 = 7cm

b) 26m3 ÷ 4m2 = 6.5m

9. Chad wants to cut back on the amount of treats he is eating. He has two chocolate bars to choose from. Which one has less chocolate? Show your thinking.

The first bar was:
V = 26cm2 x 2cm
V = 52cm3

The second bar was:
V = 5.25cm2 x 14.5cm
V = 76.125cm3

The first chocolate bar has less chocolate.

Cylinder Volume and Volume Problems

7.3