Jay Jay's Surface Area and Volume Post

Rectangular Prism

T+F+S

lxw lxw lxw

5x10=50m2 10x6=60m2 5x6=30m2

TSA=2(T+F+S)

TSA=2(50m2+60m2+30m2)

TSA=2(140m2)

Triangular Prism

bxh/2 8x9/2= 72/2

36x2=72cm

50+45+40=135cm2

TSA= 207cm2

Cylinder

πd

3.14x8=25.12mm

lxw

12x25.12=301.44mm

TSA= 50.24+50.24+301.44

TSA=40192mm2

bxh/2

3 x 5/2=

15/2=

7.5cm3

7.5 x 8.5=63.75m3

l x w x h

20 x 8 x 16= 2560cm3

bxh/2xh

4 x 8/2=

16 x 6.5=

104cm3

3/8=

.375

.375 x 104= 39cm3

πxRxRxH

3.14x6x6x15=1695.6

MANGA MANGA MANGAAAAA

Jay's Pythagorean Relationship

1. Answer in a short paragraph and with diagrams

Both a2 and b2 are equal to find the side length of the hypotenuse.

2. Solve for the missing side length.


13cm

3. Is this a right triangle? Prove it!!!

No. Both legs are not equal to hypotenuse.

Jay Jay Textbook Questions

17.

a). What is the area of the picture?

324cm²

b).What is the area of the board?

1296cm²

c).What are the dimensions of the board?

36cm²

19. Estimate the square root of 160 100. Explain how you determined your estimate.

160 = 40

100 = 10

40x10= 400

6. What is an example of a whole number that has a square root between 9 and 10.

81

Jay Jay's Percent Post :)

ipod is $285 with a 5% discount

5/100=0.05x285=14.25

285-14.25=270.75

Jeans $75 15% Discount

Discount: 15/100=0.15x75=11.25

Sale Price: 75-11.25=63.75

Method:

I divide the discount by 100 then multiply that number by the original price to find the discount amount. I subtract the discount amount from the original amount to get the discounted price.

Jay Jay's Graphing Post

1

Bar Graph Advantage: It compares data across categories.

Disadvantage: It can only be read with discrete data.

Double Bar Graph Advantage - Compares two sets of data.

Disadvantage -

Pictograph - Advantage: They are easy to read and are visually appealing

Disadvantage: Best for only 2-6 categories and very simple.

Circle Graph - Advantage - Visually appealing and shows percent total for all categories.

disadvantage - Best for only 3-7 categories and only used with discrete data.

Line Graph Advantage - Shows data over time

Disadvantage - can only be used if the data changes

2.Graphs can be misleading by..:

Break in the y-axis

one bar has a different colour

one bar is wider than the other

2.a. Line Graph and Bar Graph.

2.B.Yes because the amount sold each week is getting higher.

4

4.a. I would show the left graph (line graph) because it shows the amounts getting higher over time.

Jayjay's Proportion Post

Ratio: The relation between two amounts

Rate:Rate is a ratio that compares two quantities of different units.

Proportion:A proportion is an equation stating that two ratios are equivalent.

5 hours to travel 360 miles is about 72 mph

As a playgroup worker, if I increase the amount of apple juice I am serving at the playgroup from 25 ml to 100 ml, how much should I increase the the orange juice to, to keep the quantities in the same proportion? The orange juice is 50 ml to start with.

3/4 = 12/16 or 4/9 = 16/32

1) diagonally is the first way. multiply the top left to the bottom right and the top right to the bottom left.
2) you can do it vertically.divide the numerator to the denominator for each ratios.
3) you can do it vertically. you divide top and bottom from left to right

Does this seem fair?

No because the homeless guy felt bad and turned himself in which was good and 15 years is too much.

With what you know about proportion look and read what is in the image above. Does it seem just and fair? Why have you made this choice?

No. Because The homeless guy has less money and more years but the rich guy has more money but less years.

What would you have done if you were the judge?

I would let him off the hook because he didnt do something Really bad.