Question

http://prntscr.com/ir4n5s

Answer 1

@Vocaloid @563blackghost

Answer 2

is this correct?

Answer 3

You equation is setup correctly but your product is incorrect.

Answer 4

Oh is it.
603.19

Answer 5

If you keep it in terms of pi then yes. Are suppose to keep it as \(\bf{\pi}\) or as 3.14?

Answer 6

Keep it as is

Answer 7

How about this:
http://prntscr.com/ir4qt2

Answer 8

Also make sure your answer ends as:

\(\large\bf{V=603.19 ~ cm^{2}}\) otherwise you might get it wrong.

Answer 9

Ohh ok

Answer 10

really crucial to have your units defined otherwise you might get your entire problem wrong even if your calculations are correct.

Answer 11

Yes that actually happened before lol

Answer 12

For the next one you need to know your formula for a volume of a prism:

\(\large\bf{V=lwh}\)

You know `h=10` and `w=5` and well as the volume wanting to be `200`. So we plug in our info.

\(\large\bf{200=l(10)(5)}\)

Now we simplify to find `l`.

\(\bf{200=l(50)}\)

\(\bf{\frac{200}{50} = l}\)

What is `l`?

Answer 13

l is 4

Answer 14

yup

Answer 15

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Answer 16

First find the volume of the given dimensions.

Then you want to try doubling one dimesions each time.

\(\large\bf{8×9×16 ~~~~, ~~~ 4×18×16 ~~~~ ,~~~ 4×9×32}\)

After that try and divide the doubled dimension by the original.

What do you see occurring?

Answer 17

So the volume is 576

Answer 18

Now, do I multiply all the pairs you put?

Answer 19

try each out, yes.

Answer 20

When I multiplied each one, they all ended up with 1152 as the product.

Answer 21

Yes that is correct.

Now try and divide the outcome by 576. What is it increasing by?

Answer 22

the answer for that is 2

Answer 23

So this tells you if you increase one dimension the volume will double as well.

Answer 24

Ohh ok...you really smart LOL

Answer 25

>.< well thank you, but i still got much to learn though ;)

Answer 26

Same here LOL.
http://prntscr.com/ir5221

Answer 27

I know the formula is:
V=a^2*h/3

Answer 28

To find the volume of a square pyramid you need to use the formula:

\(\bf{V=a^{2} \frac{h}{3}}\)

The `height is 455.4` and the `base (a) is 755.9` Plug this in.

\(\large\bf{V=755.9^{2} \frac{455.4}{3}}\)

Answer 29

Ok so first divide the fraction

Answer 30

yea

Answer 31

151.8 and multiply that by 755.92^2

Answer 32

yes

Answer 33

http://prntscr.com/ir54qw
This is what I got LOL

Answer 34

Did you plug this in a calculator?

Answer 35

Cause my outcome was different.

I got \(\bf{86736214.16}\)

Answer 36

I used mathway

Answer 37

If you round your answer, it will become my answer

Answer 38

Does that make sense LOL

Answer 39

@563blackghost

Answer 40

hrmmmm

did you round the terms before the simplification?

Answer 41

no I just multiplied...I guess its automatic.

Answer 42

oh okie...

well i plugged in the equation into my calculator then double checked with mathway but the outcome is the same for meh....

Answer 43

So should I use your answer or my answer or both?

Answer 44

hrmmmm

it would be best for a second opinion to see if they get the same outcome.

Answer 45

Ok I can do that later....Can we move on tho?

Answer 46

sure

Answer 47

http://prntscr.com/ir5eg1

Answer 48

Do you know your surface area equation for a prism?

Answer 49

umm...noo

Answer 50

The equation is:

\(\bf{A=2(wl+hl+hw)}\)

First you would find the surface area of the given dimensions then try with one dimension being doubled.

\(\bf{2(4(6) + g(6) + 6(4))~~~,~~~2(8(3)+6(3)+6(8)~~~,~~~2(3(4)+12(3)+12(4)}\)

What do you see occurring?

Answer 51

Ok so first,
A=(4*3+6*3+6*4)

Answer 52

make sure to include the 2.

Answer 53

oh ok

Answer 54

108

Answer 55

yea that is right

Answer 56

I cant see all the pairs...Can you write it again please?

Answer 57

\(\bf{2(4(6) + 6(6) + 6(4))}\)

\(\bf{2(8(3)+6(3)+6(8))}\)

\(\bf{2(3(4)+12(3)+12(4))}\)

Answer 58

http://prntscr.com/ir5xya

Answer 59

Thats my answers

Answer 60

What do I do now?

Answer 61

So now you would compare if the original surface area really is doubled if one of the dimensions is doubled.

Your original surface area is `108`.

`108 x 2 = 216`

Do any of the pairs equal to 216?

Answer 62

No none of them

Answer 63

So they cannot be doubled?

Answer 64

Correct they aren't.

So yes, if the doubling of one dimension occurs the surface area does not double.

Answer 65

Okie.
http://prntscr.com/ir62xa
One more after this please

Answer 66

@563blackghost

Answer 67

Use this formula for surface area:

\(\large\bf{A=2 \pi rh + 2 \pi r^{2}}\)

Plug in your given info.

\(\large\bf{A=2(3.14)6(11.5)+2(3.14)(6^{2})}\)

Answer 68

The answer is 659.4

Answer 69

Correct?

Answer 70

yea that is right

Answer 71

Last one:
http://prntscr.com/ir6a1w

Answer 72

@563blackghost

Answer 73

@563blackghost