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
tatyana61 [14]
4 years ago
10

A games shop sells marbles

Mathematics
1 answer:
Taya2010 [7]4 years ago
5 0
To start, the question is asking for surface area of a cylinder, meaning you will have to use this formula to find it: A=2πrh+2πr^2.

Since you already know that the diameter of the plastic cylinder is 4 marbles long, and each marble is 2 cm in diameter, you would multiply 4 and 2 to get that your diameter is 8 cm. However, since the surface area of a cylinder formula uses radius, you would simply divide 8 by 2 to get that the radius of the cylinder is 4 cm. 

Now, since you already know that the height of the cylinder is equal to 10 marbles, multiply the amount of marbles by 2 to get that the height of the cylinder is 20 cm. 

Now that you know the height and the diameter of the cylinder, plug the values into the formula: A=2π(4)(20)+2π(4)^2.
Assuming that pi is 3.14, simplify the equation as according to PEMDAS and you get that the area of plastic needed to make one cylinder is 602.88 cm squared
You might be interested in
Complemetary angles are two angles whose measures add up to 90 degrees. The ratio of the measures of two complementary angles is
pochemuha

Let A and B be the two complementary angles.

A = smaller angle = 2x

B = larger angle = 13x

x = some unknown number

Note how the ratio A:B turns into 2x:13x which simplifies to 2:13

A+B = 90 ... because the angles are complementary

2x+13x = 90 ... substitution

15x = 90

x = 90/15

x = 6

A = 2*x = 2*6 = 12 degrees

B = 13*x = 13*6 = 78 degrees

The two angles are 12 degrees and 78 degrees.

Check:

A/B = 12/78 = (2*6)/(13*6) = 2/13, so A:B = 2:13

A+B = 12+78 = 90

3 0
3 years ago
Write an equation of the line with the given slope and y intercept: m = 2, b = - 3/4​
Alex

Answer:

y = 2x - 3/4

Step-by-step explanation:

Adapt the slope-intercept form:  y = mx + b.

Making the indicated substitutions, we get

y = 2x - 3/4

4 0
3 years ago
Plz help me
Iteru [2.4K]

Answer:

I think the answer is 60 feet.

Step-by-step explanation:

Because his rate is 2 feet per second and the question asks where he'll be after 30 seconds, the answer has to be 60 feet.

I hope this helps!

5 0
3 years ago
The number x is reduced by 25% and then halved
Maksim231197 [3]
Since it says the number  x , this means x represents a number , reduced by 25 means that this is most likely half of 25 so whats half of 25%?

well 5 * 5 = 25 , so here is your answer  = 5

8 0
4 years ago
4/5 to 3/5 as a tenth of a percent
Rudik [331]
12/25 that will be the answer so its the percent time always helps.
5 0
3 years ago
Other questions:
  • Hey guys I’m a little stuck ?
    8·2 answers
  • (-14x+14)1/2+14x use distributive property <br> Help please
    9·1 answer
  • Help please !! Given the parent function f(x) = x², define the function g(x) that
    7·1 answer
  • How to turn 1/4 ÷9\10 into a mixed fraction?
    6·1 answer
  • Which of the following lines the parallel to the line y-9=7(x+5)
    9·1 answer
  • Find the missing value:<br> __+6=-3
    9·2 answers
  • Can someone help me with this?<br> No links please
    6·2 answers
  • Hi can u guys help me pla
    7·2 answers
  • How do you know that the absolute value of -|-9| is equal to -9?
    8·1 answer
  • Nomonde earns a total salary of R63 420 p.a . Deductions from her salary amount to R5 785 for the year . Her other expenses are
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!