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
Nostrana [21]
2 years ago
14

CAN SOMEONE HELP ME ON ALL AND THOSE ANSWERS ARE ANSWERS FOR THESE PROBLEMS PLS HELP ME I WILL GIVE BRAINLIST ):

Mathematics
1 answer:
adell [148]2 years ago
8 0
1. 30
2. 18
3. 12.56
4. 9.42
5. 8pi
6. 5pi
7. 62.8
8. 7.5
:)
You might be interested in
For the 1,000-meter running event, Abby's mean time is 4.5 minutes with a standard deviation of 0.75 minutes. For the 800-meter
Lilit [14]

Answer:

He performed better in the 800 m race

Step-by-step explanation:

Obtain the standardized score for each event :

Zscore = (score - mean) / standard deviation

1000 meter :

Mean = 4.5 ; Standard deviation = 0.75 ; x = 4.1

Zscore = (4.1 - 4.5) / 0.75

Zscore = - 0.4 / 0.75 = - 0.5333

800 meter :

Mean = 3.2 ; Standard deviation = 0.4 ; x = 3

Zscore = (3 - 3.2) / 0.4

Zscore = - 0.2 / 0.4 = - 0.5

-0.5 > - 0.533

Hence, he performed better in the 800 m race

3 0
3 years ago
Read 2 more answers
What is 7x-4x=27,solve for x?
Elena L [17]

Answer:

x=9

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Draw a number line model to determine -9 + (-2)
belka [17]
The answer would be -11
6 0
3 years ago
Read 2 more answers
A coral reef has 187 groups of fish in each group there are 21 fish about how many fish live in the coral reef and is it multipl
prisoha [69]

The answer is about 9. And it is a division problem.

5 0
3 years ago
Read 2 more answers
I don’t know how to do this. can someone please help me :)
Kaylis [27]
The surface area of a cylinder is the sum of the area of the two ends and the lateral area.
.. surface area = 2*(end area) +(lateral area)
.. = 2*(π*r^2) +(2π*r*h)
.. = 2π*r*(r +h)
.. = 2*3.14*(8 in)*(8 in +8 in)
.. = 3.14*256 in^2
.. ≈ 803.8 in^2

The 3rd selection is appropriate.
8 0
3 years ago
Other questions:
  • Rebecca must complete 15 hours of volunteer work. She does 3 hours each day. Write a linear equation in slope-intercept form to
    15·1 answer
  • Help please don’t know this !
    11·2 answers
  • Is this Correct? If not what did I do wrong? (25 points)
    10·1 answer
  • PLEASE ANSWER ASAP!!!
    14·1 answer
  • Please please please help me with this I don’t get it
    14·1 answer
  • I need help . Plz help me
    6·1 answer
  • Complete the proof that AFGH isn't similar to AJIH.
    14·1 answer
  • 53% of students are male and 47% are female.
    10·1 answer
  • Can Someone Help with This Distributive Property Math Question : <br> 1. - ( 8x - 12 )
    14·1 answer
  • Waiting for other questions
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!