Question

Can Someone Please Help Me Find The Mass?

In step 1, you found the volume (in cubic feet) of the main tank. If the maximum density of killer whales per cubic foot is 0.000011142, what is the maximum number of killer whales allowed in the main show tank at any given time? You must explain your answer using words, and you must show all work and calculations to receive credit.

Answer 1

What are you needing to do, or to understand, at this point?

Answer 2

I tried to do this problem and i got it wrong. im just basically not sure what numbers to plug in

Answer 3

i did 0.000022242*179503.33=2

Answer 4

@mathmale

Answer 5

Sorry, Kendra: Lost my Internet connection, and OpenStudy is slow at the moment.
Are you sure you need to calculate mass?

What is the maximum number of killer whales allowed in the main show tank at any given time?

Answer 6

What is the volume of the main tank?

If you want the max. number of killer whales allowed in the main tank, calculate this:

(Whale occupational density in Whales per cubic foot) * (Tank volume in cubic feet)

Assuming that you found that the tank volume in cubic feet is 179503, then your
calculation seems appropriate. Watch those units of measurement!\[\frac{ Whales }{ cubic.foot }*cubic.feet = number.of.whales\]

Answer 7

your fine mine did the same thing to me.

Answer 8

#3 - Your answer for the mass is incorrect. Please check your work. -is what my teacher said

Answer 9

so what should my actual numbers be then?

Answer 10

Kendra, I don't believe you have shared #3 with me, nor have you shared #1. All I can see at the top of this conversation of ours is the question #2.
Can you do a screen capture of the whole problem statement?
If you're trying to calculate MASS, please share with me what you've done already.

Answer 11

the question i posted is number 3

Answer 12

yes tommorow morning i will. thank you for being so patient

Answer 13

Kendra: The problem you've posted says nothing at all about the mass:

"In step 1, you found the volume (in cubic feet) of the main tank. If the maximum density of killer whales per cubic foot is 0.000011142, what is the maximum number of killer whales allowed in the main show tank at any given time? You must explain your answer using words, and you must show all work and calculations to receive credit."

Answer 14

Yeah ik thats why i was confused

Answer 15

There's not much I can do until both of us know precisely what the question asks. I'd suggest you take a photo of the entire problem with your cell phone and upload the image to Open Study, using the Attach File key, below.

Answer 16

what I did to get 1795033.3375 is I added the volume of the main show tank plus the volume of sphere

Answer 17

I'd suggest you take a photo of the entire problem with your cell phone and upload the image to Open Study, using the Attach File key, below.

Until we're both very clear on what the goals of this problem are, we're not going to get far.

Answer 18

Ah, success! Next time, share images like this up front.
I see that the main tank is a quarter sphere, and that you're to calculate its volume to the nearest integer. (Know what that means?)

Answer 19

not really

Answer 20

Your written work shows that you already know the formula for the volume of a sphere:

It is \[V=\frac{ 4*\pi*r ^{3} }{ 3 }\]. We want only 1/4 of that. (Why?)
So, divide the volume by 4. Be sure to round to the nearest integer!

Answer 21

5.6 would be rounded up to 6. 3.2 would be rounded down to 3. and so on.

Answer 22

the volime would be 84,780 righ? and I divide that by 4?

Answer 23

The volume is \[\frac{ 4\pi }{ 3 }*r^3\]

Answer 24

Would you please calculate 4pi/3 first? Tell me what you get.

Answer 25

would it be 4?

Answer 26

An approx. value of pi is 3.14.
So, 4pi/3 is calculated by multiplying 3.14 by 4 and dividing the result by 3.
Are you working with a calculator? If so, what kind?

Answer 27

I did 4 times the pi sign over 3

Answer 28

i use script and mathway

Answer 29

Have you no calculator?

4*pi comes out to approx. 4*3.14. Try that.

Answer 30

Much better. Now multiply that by the cube of 70 meters:
4.189 * (70^3).

Answer 31

i did that the first time haha i thought u said to round.

Answer 32

1677270

Answer 33

Actually, we round off only the final answer.
What is the value of 4.189*70^3?

Answer 34

it might be easier for you to calculate 70^3 first and then multiply the result by 4.189.

Answer 35

343000*4.189=1436827

Answer 36

Yes. This time you have rounded off your answer appropriately.
Now you need to divide that result by 4, because we want only the volume of the tank, not the volume of the whole sphere. Divide your last result by 4, please.

Answer 37

Your original calculation was correct, except that you didn't round off as you were instructed to.

Answer 38

359206.75

Answer 39

i need to round the 4.18 before i calculate then?