answer.
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
goldenfox [79]
1 year ago
15

A circle whose area is 4 has a radius of x find the area of a circle whose radius is 3x

Mathematics
2 answers:
____ [38]1 year ago
7 0
The first one is 1.12867 because you need to set it up like this.
4=3.14(x)squared
4/3.14=x(squared)
x=1.12867

The second one is done simply by multiplying it out.
A=3.14(3x)squared
A=3.14(9x[squared])
A=28.26x[squared]        -The squared is referring to the x.
stich3 [128]1 year ago
3 0

Answer:

Area =  36 units.

Step-by-step explanation:

Given  : A circle whose area is 4 has a radius of x .

To find : find the area of a circle whose radius is 3x.

Solution: We have given

Area of circle = 4 units.

Radius = x .

Formula of area = pi (radius)².

Plug the values

pi (x)² = 4 -------(A)

If the radius = 3x .

Then 4

Area =  pi (3x)².

Area = pi (9)(x)².

Area = 9 pi (x)²-----(B) .

We can see from equation ( A)  4 = pi (x)²

Area = 9 * 4.

Area =  36 units.

Therefore, Area =  36 units.

You might be interested in
N triangle xyz, m∠z > m∠x m∠y. which must be true about △xyz?
liubo4ka [24]
The choices are the below that can be found elsewhere:

m∠X + m∠Z < 90° 

m∠Y > 90° 

∠X and∠Y are complementary 

m∠X + m∠Y < 90°


Since the given is m<Z > m<X +m<Y and <span>the sum of measure of angles of a triangle is equal 180 degrees so from this result that the last one choice need being true sure so m<X +m<Y < 90°</span>

4 0
2 years ago
Read 2 more answers
Chen is bringing fruit and veggies to serve at an afternoon meeting. He spends a total of $28.70 on 5 pints of cut veggies and 7
deff fn [24]
The answer would be $1.75 (Rounded off to the nearest cent).

Substitute the given cost of each pint of fruit to the equation. Transpose and simplify, to get the price of a pint of veggies.
Given: <span>5v + 7f = 28.70; f = $2.85
Solution: </span><span>5v + 7(2.85) = 28.70
                </span><span>5v + 19.95 = 28.70
                5v = 8.75
                  v = 1.75</span>
6 0
2 years ago
Read 2 more answers
Based on the graph shown to the right, whose phones cost varies directly with the amount of time spent talking?
Lena [83]

Answer:

B

Step-by-step explanation:

Given 2 quantities that vary directly, then the graph must pass through the origin.

Nikiya's graph is the only one to do this ⇒ B



8 0
2 years ago
Read 2 more answers
A botanist is using two types of plants for an experiment. She writes inequalities to model the constraints on the number of eac
Valentin [98]
The vertex (5,39)

5 is the value of x. 39 is the value of y. y is the cost function of the minimum value in dollars.

(5,39) vertex means that  <span>Buying five of each type of plant costs $39, which is the lowest possible cost.</span>
3 0
2 years ago
Read 2 more answers
Let ff be the function given by f(x)=e2x−1 x f(x)=e2x−1 x. Which of the following equations expresses the property that f(x)f(x)
navik [9.2K]

Answer:

Step-by-step explanation:

\lim_{x \to \ 0} \frac{e^{2x}-1 }{x} \\= \lim_{x \to \0} \frac{e^{2x}-1 }{2 x}  *2\\\rightarrow2 log e\\\rightarrow 2

5 0
2 years ago
Read 2 more answers
Other questions:
  • Juanita and Samuel are planning a pizza party. They order a rectangle sheet pizza that measures 21 inches by 36 inches.?They tel
    11·1 answer
  • The general form of the equation of a circle is x2 + y2 + 8x + 22y + 37 = 0. The equation of this circle in standard form is (x
    10·1 answer
  • What is the definition of undefined term?
    5·2 answers
  • 16 tons 400 pounds divided by 5
    14·1 answer
  • A lock has 5 buttons. The lock is opened by pushing two buttons simultaneously and then by pushing one button alone. How many co
    13·1 answer
  • Loki's home repairs will cost him $1,200. The bank will give him a loan for the full amount at an interest rate of 21%. The bank
    7·1 answer
  • Car A starts in Sacramento at 11am. It travels along a 400 mile route to Los Angeles at 40 mph. Car B starts from Los Angeles at
    9·1 answer
  • What is the nth term rule of the linear sequence below?
    12·2 answers
  • Solve the equation or inequality 3/2t-16=4/3t-6
    14·1 answer
  • If cheese costs $5.65 per pound, what will be the total cost of 2.2 pounds of cheese?​ plz help meee
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!