Question

http://prntscr.com/iqor7h
Math Help Please!

Answer 1

@Vocaloid @dude @SkyVoltage43

Answer 2

I need help with the last two boxes.

Answer 3

i can give you the answer but yoll need to fill out the v= ____ part

Answer 4

i dont want to get in trouble with voca

Answer 5

wym? the what part?

Answer 6

I need help with the diameter I dont know how to find that part out.

Answer 7

https://prnt.sc/iqotze

Answer 8

What is the formula for diameter?

Answer 9

i wont give yo uthis part in yellow because of voca and her rules

Answer 10

but I dont know what the formula is...

Answer 11

diamater is 2x radius

Answer 12

so what ever the daiamter is diveide by 2

Answer 13

how do we add the height in it?

Answer 14

so for the 3rd box it would be 113.1

Answer 15

If you give me the formula for it, I can do it myself...I just need the formula to figure this out

Answer 16

okay what you do is 4inches divided by 2
2 is the radius

Answer 17

ok..

Answer 18

V=pi*r^2*h

Answer 19

sorry if id just given the fromula it would of been lots easier

Answer 20

Wait...how do you use the diameter for this?

Answer 21

Like where is the diameter for this formula?
V=pi*r^2*h

Answer 22

you take the given diameter and divided it by 2 and thats how you get your radius

Answer 23

Ohhhhhh I see....ok so lemme do this one and I will show u to see if I am correct.

Answer 24

okay

Answer 25

http://prntscr.com/iqoyfa

Answer 26

yes that is right

Answer 27

http://prntscr.com/iqoyxf

Answer 28

i dont think this is right did you divide 6 by 2?

Answer 29

yes

Answer 30

idk then

Answer 31

wait are youlooking for area or volume

Answer 32

Volume lol

Answer 33

okay just making sure i got 113.1 but idk if thats right

Answer 34

for both of them it seems rigth for the first one

Answer 35

Oh

Answer 36

@563blackghost Can you check this?

Answer 37

http://prntscr.com/iqp1ag
Are these right?^

Answer 38

The second one is incorrect. The radius is stated as 2 you put `3^2` in your problem.

It should be:

\(\bf{3.14 \times 2^{2}\times 9 = 113.04}\).

Answer 39

You mean the 3rd

Answer 40

No the last one.

`Diameter: 6 and Height: 4`

You raised this one by the power of 3 where it should have been by the power of 2.

\(\bf{V=3.14 \times 3^{2} \times 4}\)

make sure you simplify this correctly.

Answer 41

It is also 113.04

Answer 42

Am I correct @563blackghost

Answer 43

yea that is right.

Answer 44

Can you help me with this please?
http://prntscr.com/iqpfal

Answer 45

Surface area formula is:

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

Answer 46

Ok so for the first one:
A=2*3.14*3*2+2*3.14*3^2

Answer 47

Which is 94.2

Answer 48

yea that is correct.

Answer 49

And it is the same for the second one...How about the diameter one?

Answer 50

Use the radius you used for the volume of the can.

So for `diameter = 4` you would use `radius = 2`. And then plug in from there.

Same thing applies for the last one.

Answer 51

What is the formula to find it out tho?

Answer 52

Using diameter?

Answer 53

you need radius not diameter.

Diameter will only apply when you find circumference.

Answer 54

Can you help me with the first one....

Answer 55

Radius or Diameter?

Answer 56

Diameter

Answer 57

Ok.

So for the surface area we use the equation that I gave: \(\bf{A=2 \pi rh+2 \pi r^{2}}\)

We are given the diameter `being 4`, BUT we need to radius.

The radius is found by: \(\bf{Radius = Diameter \div 2}\) So we divide the diameter by 2.

\(\bf{4 \div 2= 2 = r}\)

Now plug in what you know into the formula.

\(\bf{A=(2 (3.14) \times 2 \times 9) + (2 (3.14) 2^{2})}\)

Answer 58

oh ok thank you...and one more thing please

Answer 59

sure

Answer 60

So for the second one, I would do:
2*3.14*3*4+2*3.14*3^2

Answer 61

Is that correct?

Answer 62

Yea that looks right.

Answer 63

http://prntscr.com/iqq0lj
Last column

Answer 64

You would divide the surface area by the volume.

Let's do 1.

\(\large\bf{94.2 \div 56.5 \approx 1.667 = \frac{942}{565}}\)

So for 1 unit of the volume it would be \(\bf{\frac{942}{565}}\) of it for the SA.

\(\large\bf\color{red}{\frac{942}{565} : 1}\)

Answer 65

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Is it the same for the rest?

Answer 66

Yup

Answer 67

http://prntscr.com/iqq7rv

Answer 68

Make sure to simplify the fraction, other than that they are set up correctly.

Answer 69

Which ones do I have to simplify?

Answer 70

Well 2,3, and 4 need to simplified. Simply plug the fraction into your calculator then it will give you the answer in decimal form, then just simply change it back to fraction form.

If you don't have a calculator then you can use mathway.com.

Answer 71

Ok thank you for all the help!

Answer 72

no problem :D