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
EleoNora [17]
3 years ago
6

Mrs. Stevens is wanting to buy new border for her math bulletin board in the hallway l. The length of the board is 6.8 meters. T

he width is 2.3 meters. How much border does Mrs. Stevens need to buy?
Mathematics
1 answer:
Maurinko [17]3 years ago
7 0

she needs 18.2 meters

You might be interested in
There are many ways to measure the reading ability of children. Research designed to improve reading performance is dependent on
ELEN [110]

Answer:

A 90% confidence interval to estimate the mean DRP score in Henrico County Schools  is =32±2.7280

i.e. C.I.  [29.3,34.7]

Hence the results are not significant.

Step-by-step explanation:

Given:

Total no of students =44

True mean =32

Standard deviation=11

And all 4 students score also given.

To Find:

90 % confidence interval and conclusion on it.

Solution:

Here for C.I. we required mean, standard deviation and no of students.

So mean =32,S.D.=11 and n=44

Therefore , For 90 % interval Zscore is Z=1.645

C.I.=mean±Z[Standard  deviation/Sqrt(n)]

=32±1.645[11/Sqrt(44)]

=32±1.645[1.6583]

=32±2.7280

i.e. C.I.  [29.3,34.7]

Now Here to commit on calculated interval we should check  value of Z-score

So we need to calculate the sample mean.

Sample mean =Sum of all values /Total no of values.

=[40+ 26 +39+ 14+ 42+ 18 +25+ 43+ 46 +27 +19+ 47+ 19 +26+ 35 +34+ 15+ 44 40+ 38+ 31+ 46 +52 +25+ 35 +35+ 33 +29 +34 +41 +49+ 28+ 42+ 47 +35 +48 +22 33+ 41 +51 +27 +14+ 54 +45]/44

=34.86

Z-score=(sample mean -true mean)/[standard deviation/Sqrt(n)]

=(34.86-32)/[11/Sqrt(44)]

Z=1.72465

For ,

P(Z≥1.72465)=0.08544

For 0.05 significance level  the results are not significant at  p<0.01.

Researcher claimed mean is not correct upto 0.05 significant level

i.e calculated mean and Sample mean are different.

Hence the results are not significant.

6 0
2 years ago
Could someone answer this and explain an easier way to do this?
goblinko [34]

Answer:

Area of the figure = 109 cm. square

Step-by-step explanation:

The radius of the semi circle is 12 ÷ 2 = 6 cm.

Area of the semi circle = \frac{1}{2}\pi(6^{2})=18\pi

The radius of the quarter circle is 6 cm.

Area of the quarter circle = \frac{1}{4}\pi(6^{2}=9\pi

The area of the rectangle = 12 × 2 = 24

The area of the figure = 18π + 9π + 24 = 108.78 ≅ 109 cm. square

3 0
2 years ago
The dimensions of the following matrix M are 2 x 3.<br><br><br><br> True<br> False
Lostsunrise [7]

Answer:

true, refer to picture for more understanding :)

3 0
3 years ago
Read 2 more answers
HELP PLEASE ASAP!! (10 pts)
Mandarinka [93]

Answer:

is there a question or picture?

8 0
2 years ago
What is another way to write 75 ? 7+7+7+7+7 5+5+5+5+5+5+5 7×7×7×7×7 5×5×5×5×5×5×5
kakasveta [241]
77-2 = 75 so that is another way :) yet, you can do 5*15 :)

Mark as brainliest pleases and thank you!
6 0
3 years ago
Read 2 more answers
Other questions:
  • 14% of 81 is what number
    6·2 answers
  • julian is mixing drops of food coloring to create green frosting for a cake he uses 18 drops of yellow dye and 12 drops of blue
    8·1 answer
  • What is the volume of a rectangular prism with the following dimensions
    13·1 answer
  • Brian runs 4 miles in 34 minutes. How many minutes per mile does Brian run?
    8·2 answers
  • I want to know how to get the answer which is “3/10” can anyone tell me the steps to solving this probability problem?
    6·1 answer
  • Plz help.<br> N+ 4/3=1/3 what's a fact family just the N don't give a fraction
    9·2 answers
  • PLZ HURRY. find angle b I NEED HELP FIGURING OUT HOW TO DO THESE ROBLEMS IN GENERAL​
    14·1 answer
  • What are the LDC between 4/9 &amp; 2/3
    15·1 answer
  • Question 7 7. Which equation is true? A 831 102 = 8.310 B. 405. 103= 406,000 C. 915. 10+ = 915.000 D. 257 102 = 257.000 СА​
    7·1 answer
  • PLS HELP MY GRADE DEPENDS ON IT <br><br> Image is attached below
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!