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lyudmila [28]
3 years ago
13

If a cell has a volume of 3nm, what are the surface area and the volume of the cell?

Mathematics
1 answer:
harkovskaia [24]3 years ago
7 0
A cell has a radius: r = 3 nmThe surface area of a cell:A = 4 r² π = 4 · 3² π = 4 · 9 π = 36 π nm²The volume of a cell:V = 4/3 r³ π = 4/3 · 3³ π = 4 · 9 π = 36 π nm³Answer: The surface area is 36 π nm² and the volume is 36 π nm³.
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Ruth buys 19 identical tickets for £280.25.<br> Estimate the cost of one ticket.
xxTIMURxx [149]

Answer:

The cost of one ticket is $14.75

Step-by-step explanation:

To find the cost of one ticket we need to divide 280.25 by 19

=$14.75

plz mark me as brainliest

3 0
3 years ago
Read 2 more answers
3^x = 27^a+b and a^2-b^2/(a-b)=5 What is x?
Colt1911 [192]
Your answer should be 3x-x+2=4 hope this helps..
4 0
3 years ago
The area of the rectangle window is4779 cm to the second power if the length of the window is 81 cm what is the width
TiliK225 [7]

9514 1404 393

Answer:

  59 cm

Step-by-step explanation:

The area is the product of length and width. Using the given numbers, we have ...

  A = LW

  4779 cm² = (81 cm)W

  W = (4779 cm²)/(81 cm) = 59 cm

The width of the window is 59 cm.

8 0
3 years ago
The length of one side of a square is (x + 2 1/4). If the perimeter is 14 units, what is the area?
Stels [109]

The perimeter is the total of adding all of the side lengths together.

A square has 4 equal side lengths.

So the perimeter of a square is:

P = s + s + s + s  or  P = 4s

[P = perimeter       s = side lengths of the square]


Since you know the side length of the square is (x + 2 1/4), you can replace s with (x + 2 1/4)

P = 4s

P = 4(x + 2 1/4)  Multiply 4 into (x + 2 1/4)

P = 4x + 8 4/4

P = 4x + 9

Since you know the perimeter, you can plug it in.(you could have also plugged it in in the beginning)

P = 4x + 9

14 = 4x + 9  Subtract 9 on both sides

5 = 4x  Divide 4 on both sides

5/4 = x


Now that you know x, find the side length of the square.

(x + 2 1/4)

(5/4 + 2 1/4)

2 6/4 = 3 2/4 = 3 1/2 units or 3.5 units


To find the area of a square, you multiply 2 of the sides together:

A = s · s  

A = 3.5 · 3.5

A = 12.25 units²

7 0
3 years ago
I did my best to fit it all lol, can someone please help? &lt;3
pav-90 [236]

Answer:

8a. 0 8b. -1/3

Step-by-step explanation:

slope formula: \frac{y_{2} - y_{1}}{x_{2} - x{1}}

8a. => (8 + 12)/(17 - 17) = 20/0 = 0

8b. (1 + 2)/(-3 - 6) = 3/-9 = - 1/3

3 0
2 years ago
Read 2 more answers
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