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
goldenfox [79]
3 years 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]3 years 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]3 years 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
a college freshman started the year with $4000 in spending money and after three months,she has $2800 left.assume that she will
gulaghasi [49]
Let's find out how much she spent every month.

4000 (starting money) - 2800 (remaining money) = 1200 spent over 3 months

1200/3 = 400 per month was spent

So if she continues to spend 400 a month?

How many months are left? 12 (months of the year) - 3 (months she already spent) = 9

So 9 (remaining months) * 400 (amt per month) = 3600 she'll spend at the going rate over 9 months.

But she only has 2800 left.

2800 (remaining) - 3600 (estimated total of spending) = -800

So she will be 800$ in debt at the end of the year at the current rate.
3 0
3 years ago
Unknown to a medical researcher, 6 out of 25 patients have a heart problem that will result in death if they receive the test dr
Fiesta28 [93]

Using the hypergeometric distribution, it is found that there is a 0.0002 = 0.02% probability that exactly 6 patients will die.

<h3>What is the hypergeometric distribution formula?</h3>

The formula is:

P(X = x) = h(x,N,n,k) = \frac{C_{k,x}C_{N-k,n-x}}{C_{N,n}}

C_{n,x} = \frac{n!}{x!(n-x)!}

The parameters are:

  • x is the number of successes.
  • N is the size of the population.
  • n is the size of the sample.
  • k is the total number of desired outcomes.

The values of the parameters for this problem are:

N = 25, k = 6, n = 8.

The probability that exactly 6 patients will die is P(X = 6), hence:

P(X = x) = h(x,N,n,k) = \frac{C_{k,x}C_{N-k,n-x}}{C_{N,n}}

P(X = 6) = h(6,25,8,6) = \frac{C_{6,6}C_{19,2}}{C_{25,8}} = 0.0002

0.0002 = 0.02% probability that exactly 6 patients will die.

More can be learned about the hypergeometric distribution at brainly.com/question/24826394

#SPJ1

8 0
2 years ago
Can someone help please<br><br> 2y+3=3(y+7)
NikAS [45]

Answer:

y = -18.

Step-by-step explanation:

hope that helps

5 0
2 years ago
Read 2 more answers
It takes Adara 3 hours to drive from Ashdown to Bridgeton at an average speed of 60 mph.
Scrat [10]

Answer:

61.2 mph

Step-by-step explanation:

Let's first calculate the individual legs of Adara's trip in terms of both time and distance:

<u>Ashdown to Bridgeton</u>

3 hr at 60 mph = 180 miles in 3 hours

<u>Bridgeton to Carton</u>

30 miles at 70 mph:  30 miles/(70 miles/hour) = 0.429 hours

<u>Total Trip</u>

Miles = 180 + 30 = 210 miles

Time = 3 + 0.429 = 3.429 hours

Average speed is (210 miles)/(3.429 hours) = 61.25 or 61.2 miles/hour to 1 decimal point.

8 0
2 years ago
PLEASE HELP MEEEE<br> Describe the relationship of input and output values for composite functions.
Rus_ich [418]
A COMPOSITE FUNCTION IS A COMBINATION OF TWO FUNCTIONS SUCH THAT THE OUTPUT FROM THE FIRST FUNCTION BECOMES THE INPUT FOR THE SECOND FUNCTION.  
IN A COMPOSITE FUNCTION f[g(x)], SOMETIMES WRITTEN (fog) (x), THE OUTPUT OF FUNCTION G IS THE INPUT TO FUNCTION F.
4 0
3 years ago
Other questions:
  • Which soap dispenser shows that 64% of its soap has been used?
    8·2 answers
  • What is the product (7x10^-5)x(5x10^-8) in scientific notation
    7·1 answer
  • #1: 36 in.=__________ft?
    12·1 answer
  • Find the slope of the line that passes through (1, 4) and (10, 9). Simplify your answer and write it as a proper fraction, impro
    5·2 answers
  • What is the quotient of 33,075 divided by<br> 35?
    14·2 answers
  • The graph of y=x^3 is transformed as shown in the graph below. Which equation represents the transformed function?
    11·1 answer
  • Austin burns 120 calories per 30 minutes of weight training. How many calories does he burn in 90 minutes?
    8·2 answers
  • What is 1/2 of 2/3 of 4/5 of 100?
    11·2 answers
  • A clairinet case is shaped like a rectangular prisim the case is 8 inches tall 3 inches wide and has a volume of 312 cubic inche
    6·1 answer
  • A family pays $34.56 for souvenirs on vacation if the sales tax is 7.5% what is the total amount the family spent on souvenirs
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!