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
Makovka662 [10]
3 years ago
7

The expression πr² is used to determine the area of a circle, where r is the length of the radius. What does the expression π(5b

)² represent?
a) the area of a circle with radius 5

b) the area of a circle with radius 25

c) the area of a circle with radius 5b

d) the area of a circle with radius 25b²
Mathematics
1 answer:
Monica [59]3 years ago
8 0
The answer is c because all you are doing here is subbing the variable r for 5b.
You might be interested in
What is the length of side YZ?
bezimeni [28]
Be more specific. Like what is it asking you to do ? I'm trying to help. :)
3 0
3 years ago
Fluoxetine, a generic anti-depressant, claims to have, on average, at least 20 milligrams of active ingredient. An independent l
san4es73 [151]

Answer:

t=\frac{18.7-20}{\frac{5}{\sqrt{80}}}=-2.326    

df=n-1=80-1=79  

p_v =P(t_{(79)}  

Step-by-step explanation:

Information given

\bar X=18.7 represent the sample mean for the content of active ingredient

s=5 represent the sample standard deviation for the sample  

n=80 sample size  

\mu_o =20 represent the value that we want to test

t would represent the statistic

p_v represent the p value for the test

System of hypothesis

We need to conduct a hypothesis in order to check if the true mean for the active agent is at least 20 mg, the system of hypothesis would be:  

Null hypothesis:\mu \geq 20  

Alternative hypothesis:\mu < 20  

The statistic would be:

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}  (1)  

Now we can calculate the statistic:

t=\frac{18.7-20}{\frac{5}{\sqrt{80}}}=-2.326    

P value

The degrees of freedom are calculated like this:

df=n-1=80-1=79  

Since is a one left tailed test the p value would be:  

p_v =P(t_{(79)}  

6 0
3 years ago
What is the volume of the shape?
Sergeeva-Olga [200]

The volume of the triangular prism = V = (base-area)*height

Thus the volume is \\V = (\frac{1}{2} *3*4) * 7 = 6 * 7 = 42.

Thus the volume is 42 cubic km.

Hope that helps!

6 0
2 years ago
BRAINLIEST TO CORRECT
ella [17]

9514 1404 393

Answer:

  60

Step-by-step explanation:

Let x represent the number of members last summer. Then 90% more is 1.9x. We are told this is 114, so we have ...

  1.9x = 114

  x = 114/1.9 = 60

There were 60 members last summer.

6 0
3 years ago
Quadrilateral
Vedmedyk [2.9K]

Answer: the anwser is 5 trust me

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • -(7z-6)+9z-3 simplify
    11·2 answers
  • Express your answer as a polynomial in standard form.
    7·2 answers
  • Tanya is training a turtle for a turtle race. For every of an hour that the turtle is crawling, he can travel of a mile. At what
    9·1 answer
  • Solve the numerical expression
    7·1 answer
  • Find the image of (9, 5) after a counterclockwise rotation of 270° about the origin.
    14·2 answers
  • Need quick!!!!! 20 points!!!! Amir drove from Jerusalem to the lowest place on Earth, the Dead Sea. His altitude relative to sea
    13·2 answers
  • Which steps could be used to solve this story problem? Krissy had 32 bagels. She gave an equal number of bagels to each child. T
    15·1 answer
  • What is 2.26 (26 repeating)as a fraction
    5·1 answer
  • Alexandra has some dimes and some quarters. She has no more than 21 coins worth a minimum of $3.75 combined. If Alexandra has 4
    9·1 answer
  • How to tell if ratios are equivalent.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!