Ethan's Surface Area post

<sup>Rectangular Prism


T = 5x10 = 50m2
F = 6x10 = 60m2
S = 5x6 = 30m2

TSA = 2 (T+F+S)
= 2 (50+60+30)
= 2 (140)
= 280m2
Triangular Prism</sup>

bxh
2
9x8
2
72
2
36 cm<sup>2

TSA = 40+45+50+36+36
= 207cm2
Cylinder</sup>


r= d
2

r= 8
2
r= 4

SA = (2x3.14x16)+(3.14+8+12)
=401.92 mm<sup>2

Volume

Cylinder</sup>

V= 3.14(6²x15)
V= 3.14(540)
V= 1695.6cm3

Triangular Prism 3\8 full


V= 4x8 x 6.5
2
V= 14x6.5
V= 91x0.375
V= 34.125cm3

Rectangular Prism


V= 20x8x16
V= 2560cm3

Triangular Prism


V= 5x3 x 8.5
2
V= 7.5x8.5
V= 63.75cm3

Ethan's Pythagorean Relationship scribe

1. The sum of the areas of the 2 legs added together equal the sum of the area of the hypotenuse.

2.

a2+b2=c2

122+52=c2

(12x12) (5x5)

144+25=169cm2

square root of 169 =13cm

3.

a2+b2=c2

82+62=112

(8x8)+(6x6)=(11x11)

64+36=121

c squared = 121 squared = 11cm

It is not a perfect square because the sum of the area of the 2 legs don't equal the sum of the are of the hypotenuse

Ethans Scribe Post

9. What are all possible whole numbers that have a square root between 4 and 5 ?

Answer - 17,18,19,20,21,22,23,24

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

Answer - 84

15. Order the following numbers from least to greatest, square root of 46, square root of 27, 7, 5.8, 6.3

Answer - Square root of 27, 5.8, 6.3, square root of 46, 7

Ethans Scribe Post

9. What are all possible whole numbers that have a square root between 4 and 5 ?

Answer - 17,18,19,20,21,22,23,24

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

Answer - 84

15. Order the following numbers from least to greatest, square root of 46, square root of 27, 7, 5.8, 6.3

Answer - Square root of 27, 5.8, 6.3, square root of 46, 7

Ethan's Percent Post

RCEETNP - PERCENT
Percent means out of 100

CRATFIOLNA - FRACTIONAL
A fractional percent is a percent that includes a portion of 1%

MCNOBDEI - COMBINED
Combined percents are percent that are combined together

5)

What percent does each diagram represent? One completely shaded gird represents 100%

a)0.7%
b)0.3%
c)50.1%

Ethan's Graphing Post

Bar Graph

Advantages -
it is easy to understand
can easily compare two or three data sets

Disadvantages - graph categories Can be reordered to emphasize certain effects
only use with separate data

Line Graph

Advantages -
can compare multiple data sets easily
data can be inferred from graph line

Disadvantages -
use only with continuous date

Circle Graph

Advantages -
visually appealing
shows the total for each category

Disadvantages -
the data is not exact
hard to compare 2 data sets
the total is unknown unless specified

Pictograph

Advantages -
easy to read
visually appealing

Disadvantages -
very simplistic
icons must be the same size

Double Bar Graph

Advantages -
best for comparing 2 data sets

Disadvantages -
it could confuse people

Misrepresentation -
break in the y axis
if bars are bigger than others
if pictures on the pictograph are not the same size

2a) I would use a bar graph and a line graph

2b) I would continue selling them because on a line graph the sales are going up


4a) I would choose the line graph

4b)

Ethan's Proportion Post

Ratio - A comparison of 2 quantities that have the same units of measurement
Rate - A comparison of 2 quantities that have different units of measurement
proportion - A statement that proves that rates are even
a proportion has 2 equivalent fraction (ratios)

Examples





















no do not think this is fair because the homeless got 15 years of prison and only stole $100 and then he felt guilty so he confessed . The other man stole 3 billion but only got 3 years in prison.
I really don't think this is fair