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
Ghella [55]
3 years ago
14

What's the radius of a circle

Mathematics
1 answer:
cupoosta [38]3 years ago
7 0
The correct answer is:
R= c/2(3.14)
You might be interested in
I need to solve this problem
pentagon [3]
The top would the width, the 7. would be height and the last would be the lemgth
5 0
3 years ago
A cylindrical can without a top is made to contain 25 3 cm of liquid. What are the dimensions of the can that will minimize the
Basile [38]

Answer:

Therefore the radius of the can is 1.71 cm and height of the can is 2.72 cm.

Step-by-step explanation:

Given that, the volume of cylindrical can with out top is 25 cm³.

Consider the height of the can be h and radius be r.

The volume of the can is V= \pi r^2h

According to the problem,

\pi r^2 h=25

\Rightarrow h=\frac{25}{\pi r^2}

The surface area of the base of the can is = \pi r^2

The metal for the bottom will cost $2.00 per cm²

The metal cost for the base is =$(2.00× \pi r^2)

The lateral surface area of the can is = 2\pi rh

The metal for the side will cost $1.25 per cm²

The metal cost for the base is =$(1.25× 2\pi rh)

                                                 =\$2.5 \pi r h

Total cost of metal is C= 2.00 \pi r^2+2.5 \pi r h

Putting h=\frac{25}{\pi r^2}

\therefore C=2\pi r^2+2.5 \pi r \times \frac{25}{\pi r^2}

\Rightarrow C=2\pi r^2+ \frac{62.5}{ r}

Differentiating with respect to r

C'=4\pi r- \frac{62.5}{ r^2}

Again differentiating with respect to r

C''=4\pi + \frac{125}{ r^3}

To find the minimize cost, we set C'=0

4\pi r- \frac{62.5}{ r^2}=0

\Rightarrow 4\pi r=\frac{62.5}{ r^2}

\Rightarrow  r^3=\frac{62.5}{ 4\pi}

⇒r=1.71

Now,

\left C''\right|_{x=1.71}=4\pi +\frac{125}{1.71^3}>0

When r=1.71 cm, the metal cost will be minimum.

Therefore,

h=\frac{25}{\pi\times 1.71^2}

⇒h=2.72 cm

Therefore the radius of the can is 1.71 cm and height of the can is 2.72 cm.

6 0
3 years ago
Half of a number decreased by 27
bija089 [108]

"Half of a number decreased by 27" can be displayed as:

<u>1/2x - 27</u>

3 0
3 years ago
How much of a stick of butter is 1/2 cup?
V125BC [204]
1 stick of butter :))))))))))))))
4 0
3 years ago
What statement is true? 1) 5 is a whole and not a integer. 2) 5 is a integer and not a whole. 3) 5 isn't a integer or whole 4) 5
Lorico [155]

Answer:

4

Step-by-step explanation:

5 is  an integer as well as a whole number. A whole number is one which has no fraction with it. And clearly, 5 is a positive integer. Hence, option 4 is correct that is  5 is a integer and a whole

7 0
3 years ago
Other questions:
  • Simplify. –20 + (–2) • (–6) = A. –132 B. –32 C. –8 D. 132
    5·2 answers
  • Evaluate this expression: 3x + 9x -5
    11·1 answer
  • If the sum of a number and eight is tripled the result is four less than twice the number. Find the number
    10·1 answer
  • What are the outliers of 42,43,46,48,57,60,96,59,38,68,29
    15·1 answer
  • If you can buy 5 bags of bananas for $28.15, find the unit price of a bag<br> of bananas.
    13·1 answer
  • Question number five
    11·1 answer
  • What is 3x+5=2x-7<br> need step by step explanation
    7·2 answers
  • Which is a complete list of factors of each term in the expression 16 a + 18 a b?
    9·2 answers
  • Find Cecilia’s average monthly income if her biweekly take-home pay is $764.00. Help please. Will give braineliest
    14·2 answers
  • Please narrate every step you make and make a 2 column proof!<br><br>thank you!!
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!