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
Artemon [7]
3 years ago
14

Find the circumference of a circle with an area of 615.75 square inches.

Mathematics
1 answer:
Fittoniya [83]3 years ago
3 0
A=pie×radius squared is the area formula of a circle. The circumference formula or a circle is C=pie×diameter. 615.75=(3.14)(radius) squared. Divide both sides by the 3.14. What ever 615.75 divided by 3.14 is-is radius squared. The square root is your radius. The radius is half the diameter, so double what you have right now as the radius to get the diameter. Now since C=pie×diameter, your circumference is your pie×your diameter. Whatever your answer is-is your circumference.
You might be interested in
Which of the following is a rational number? I give 20 pts!
LenKa [72]

Answer:

It's b. 100

Step-by-step explanation:

10 x 10= 100 = rational number, other include a series of numbers that cannot be written down.

Sorry if this is wrong hope I did the math right. :)

4 0
3 years ago
An evolutionary biologist examined the relative fitness of Escherichia coli bacteria grown for 2000 generations, about 300 days,
Varvara68 [4.7K]

Answer:

Step-by-step explanation:

Hello!

The variable of interest is:

X: fitness of a line of E. coli grown on an acidic environment.

n= 6 E. coli lines

Recorded fitness for each line: 1.24, 1.22, 1.23, 1.24, 1.18, 1.09

The relative fitness of 1 indicates that both bacteria types are equally fit.

A relative fitness larger than 1 indicates that the acid-evolved line is more fit than the parental line kept at neutral pH when both are grown in acidic conditions.

Meaning that if the average fitness of the E. coli lines grown on an acidic environment is greater than 1 then they are better adjusted to live in acidic conditions, symbolically: μ > 1

The statistic hypotheses are:

H₀: μ ≤ 1

H₁: μ > 1

α: 0.05

Assuming that the variable has a normal distribution you have to apply a one-sample t-test:

t= \frac{X[bar]-Mu}{\frac{S}{\sqrt{n} } } ~~t_{n-1}

X[bar]= 1.20

S= 0.06

t_{H_0}= \frac{1.20-1}{\frac{0.06}{\sqrt{6} } } = 8.40

The p-value for this test is 0.0002

Since the p-value= 0.0002 is less than α:0.05 the decision is to reject the null hypothesis.

Then at a 5% significance level, there is significant evidence to conclude that the bacteria evolved in acidic pH are better adapted to acidic conditions.

I hope you have a SUPER day!

7 0
3 years ago
Which expression is NOT equivalent to 6x + 2y + 10
eduard
The answer to the question is d
7 0
3 years ago
Read 2 more answers
there are 55 students in a band 11 are 6th graders 21 are 7th grader and 23 are 8th graders what is the ratio of the 6th graders
Sonbull [250]

Answer:

11 : 44

Step-by-step explanation:

There are 11 6th graders and a combination of 44 7th and 8th graders. Therefore, the ratio is 11 : 44. Hope this helps!

8 0
2 years ago
Steve drove at a constant rate to the beach for a vacation. In the equation below, t is the time in hours it took Steve to drive
My name is Ann [436]
310/62= hours which equals 5! hope this helped a bit.
5 0
3 years ago
Read 2 more answers
Other questions:
  • A circle has an area of 497 square inches. What is the circumference of the circle?
    13·1 answer
  • In an article about the cost of health care, Money magazine reported that a visit to a hospital emergency room for something as
    14·1 answer
  • Li buys supplies so he can make and sell key chains. He begins to make a profit only after he sells 4 key chains. What point on
    11·1 answer
  • The degree measure of one of two complementary angles is 30 less than twice that of the other. What are the degree measures of t
    8·1 answer
  • I have to answer this
    12·1 answer
  • The M & P Pencil company that makes mechanical pencils expects to have two defective pencils for every 15 made. What is the
    7·1 answer
  • The price of Stock A at 9 A.M. was ​$12.79 Since​ then, the price has been increasing at the rate of ​$0.11 each hour. At noon t
    10·1 answer
  • I need help with 5,6,7 please
    14·1 answer
  • Simplify the expression<br><br> -4 + 3 + 5 =
    5·1 answer
  • Need an answer to this one. (Choose a point either A/B/C/D)
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!