1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ludmilkaskok [199]
3 years ago
6

): How many times longer is the diameter of a grain of sand than the diameter of the average cell in the human body? Show your w

ork.    Need help bad:(
Mathematics
1 answer:
Airida [17]3 years ago
4 0
<span>Approximately 25. Of the 5 grades of sand used in the United states, medium sand has particles ranging from 0.25 mm to 0.5 mm. For convenience, I'll use 0.5mm as the diameter of a grain of sand. Human cells range from a volume of 30 cubic micrometers (human sperm cell) up to 4 million micrometers (human egg cell). For the average human cell, I'll use an osteoblast with a volume of 4000 cubic micrometers or a diameter of 2x10^-5 meters. Now just take the diameter of a grain of sand and divide by the diameter of a human cell. 5 x 10^-4 / 2x10^-5 = 5/2 x 10^(-4 - -5) = 2.5x10^1 = 25 So the diameter of a grain of sand at 0.5 mm is approximately 25 times larger than that of a human cell at 0.02mm</span>
You might be interested in
What is the order of the set A={-1,20,3,17,5}
laiz [17]

Hey!

Hope this helps...

~~~~~~~~~~~~~~~~~~~~~~~~~~~

I'm assuming your talking about least to greatest, OR greatest to least.  If so, that's what I'll do...


Least to Greatest: -1, 3, 5, 17, 20

Greatest to Least: 20, 17, 5, 3, -1

~~~~~~~~~~~~

Unfortunately I did not completely understand the question, for future reference please give AS MUCH detail as possible so that your fellow brainly members can help you ASAP...

And thanks for using Brainly!

3 0
3 years ago
Determine which would make this solution true s &lt; 0.43
sattari [20]

Answer:

B and D it ez

Step-by-step explanation:

4 0
3 years ago
Cole needs at least $815 to cover travel and hotel expenses for an upcoming national singing competition. He is setting up a wee
Ratling [72]
It would take 6 weeks for Cole to make 750$ and the 65$ he had received from the open mic would make it 815$
3 0
3 years ago
Read 2 more answers
Type the correct answer in each box
Luba_88 [7]

Answer:

We know that the equation of the circle in standard form is equal to <em>(x-h)² + (y-k)² = r²</em> where (h,k) is the center of the circle and r is the radius of the circle.

We have x² + y² + 8x + 22y + 37 = 0, let's get to the standard form :

1 - We first group terms with the same variable :

(x²+8x) + (y²+22y) + 37 = 0

2 - We then move the constant to the opposite side of the equation (don't forget to change the sign !)

(x²+8x) + (y²+22y) = - 37

3 - Do you recall the quadratic identities ? (a+b)² = a² + 2ab + b². Now that's what we are trying to find. We call this process <u><em>"completing the square"</em></u>.

x²+8x = (x²+8x + 4²) - 4² = (x+4)² - 4²

y²+22y = (y²+22y+11²)-11² = (y+11)²-11²

4 - We plug the new values inside our equation :

(x+4)² - 4² + (y+22)² - 11² = -37

(x+4)² + (y+22)² = -37+4²+11²

(x+4)²+(y+22)² = 100

5 - We re-write in standard form :

(x-(-4)²)² + (y - (-22))² = 10²

And now it is easy to identify h and k, h = -4 and k = - 22 and the radius r equal 10. You can now complete the sentence :)

5 0
3 years ago
What is the error in -1.75+-1+4.25+3.75+1+ -4.75+2=18.5
allochka39001 [22]

Answer:

they don't respect the signs

Step-by-step explanation:

when you have a problem like the one above you have to put parentheses to the negative numbers either to add or subtract them, there is where the sign rule comes in

6 0
3 years ago
Read 2 more answers
Other questions:
  • Plz help me!
    12·2 answers
  • Please answer!<br> •<br> ••••••••••••••<br> ••••••••••••••
    7·1 answer
  • At the last basketball game, Sammie, Megan and Makayla scored a total of 50 points! Sammie scored 8 more points than Megan, and
    5·1 answer
  • Suppose that in​ 2008, 945, 350 citizens died of a certain disease. Assuming the population of the country is 332 ​million, what
    11·2 answers
  • During the rock cycle, rocks get broken apart by weathering, carried along by erosion, and eventually deposited in a body of wat
    14·2 answers
  • Plz help will mark brainliest if correct answer only ​
    14·1 answer
  • Can someone help me on this
    14·1 answer
  • Will give brainliest for answer!!!
    12·1 answer
  • One of the factors of x³ - 27 is x - 3. What is the other factor?
    14·1 answer
  • The energy needs of an eagle range between 350-600 calories per day. If it gets 120 calories from consuming 1 snake, how many sn
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!