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
VladimirAG [237]
3 years ago
14

2nd Question.... Will mark brainiest

Mathematics
2 answers:
stiks02 [169]3 years ago
8 0

Answer:

c

Step-by-step explanation:

40x3.14=125.6

MakcuM [25]3 years ago
4 0

Answer:

C

Step-by-step explanation:

so you use your diameter 40 and multiply it by it by 3.14 to get your circumfrence

You might be interested in
What is the right way to use substitution method?​
Kazeer [188]

Answer:

Step-by-step explanation:

Substitution method can be applied in four steps. Step 1: Solve one of the equations for either x = or y = . Step 2: Substitute the solution from step 1 into the other equation. Step 3: Solve this new equation Happy too help!

7 0
3 years ago
) An instructor gives his class a set of 18 problems with the information that the next quiz will consist of a random selection
RSB [31]

Answer:

The probability the he or she will answer correctly is 1.5%

Step-by-step explanation:

In all, there are 18 problems. In this question, the order of which the problems are sorted for the quiz makes no difference. For example, if the question A of the quiz is P1 and question B P2, and question A P2 and question B P1, it is the same thing.

There are 18 problems and 9 are going to be selected. So, there is going to be a combination of 9 elements from a set of 18 elements.

A combination of n elements from a set of m objects has the following formula:

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

In this question, m = 18, n = 9. So the total number of possibilities is:

T_{p} = C_{(18,9)} = \frac{18!}{9!(18-9)!} = 48620

Now we have to calculate the number of desired outcomes. This number is a combination of 9 elements from a set of 13 elements(13 is the number of problems that the student has figured out how to do).

Now, m = 13, n = 9. The number of desired possibilities is:

D_{p} = C_{(13,9)} = \frac{13!}{9!(13-9)!} = 715

The probability is the number of desired possibilities divided by the number of total possibilities. So

P = \frac{715}{48620} = 0.015 = 1.5%

The probability the he or she will answer correctly is 1.5%

3 0
3 years ago
Which statement is true? A matrix separates rational and irrational numbers. A matrix separates positive and negative numbers. A
Jet001 [13]
I'm pretty sure the answer is "A matrix separates rational and irrational numbers." (Note: I'm not that great with memorizing definitions, but I'm pretty sure.) Hope this helps :)
5 0
3 years ago
Gonna need help answering this <br> Y=1/2x+7<br> Y=x-8
Nata [24]
What is the problem?
3 0
3 years ago
Read 2 more answers
Use the quadratic formula to find the roots: -3x^2 + 27x = 42​
ch4aika [34]

Answer:

x=2,x=7

Step-by-step explanation:

-3x^2+27x=42

x^2-9x+14=0

x^2-2x-7x+14=0

x*(xi2)-7(x-2)=0

(x-2)*(x-7)=0

x-2=0

x-7=0

x=2

x=7

8 0
3 years ago
Other questions:
  • Five times a number is greater then 25
    9·2 answers
  • How many total atoms are in 3 molecules of CO2 (carbon dioxide)?
    11·2 answers
  • The length of a rectangle is 7 more than the width. The area is 744 sqaure yards, find the length and width of the rectangle
    10·1 answer
  • Find the midpoint and length between each pair of points. (5,5) (-1,3)<br><br> PLEASE HELP!!
    9·1 answer
  • Tina got a haircut, and her hair is still at least 15 inches long, write and graph an inequality​
    7·1 answer
  • Please help me ! i'm bad @ math (::
    10·2 answers
  • Jin is tracking how much food he feeds his dog each week. After 2 weeks, he has used 8 1/2 cups of dog food. After 5 weeks,he ha
    10·1 answer
  • Pls help I need it now
    11·1 answer
  • im giving extra points, can someone please tell me if this is right or not? im not sure if it is because i dont fully understand
    9·1 answer
  • 1/3 x + 4 = x − 2 solve for x
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!