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
omeli [17]
2 years ago
8

Please help it’s easy I think

Mathematics
1 answer:
Nikitich [7]2 years ago
4 0

The frequency of revision times is given by the product of the frequency

density value and the class width.

Correct response:

  • The number of students are <u>72 students</u>

<h3>Methods of calculation using a histogram</h3>

The estimate of the number of students who revised for less than 45

minutes is given by the area, <em>A,</em> under the histogram to the left of the 45

minute mark as follows;

Frequency, f = Frequency density × Class width

Number of students = ∑f

Therefore;

A = 5 × 2 + 10 × 2.2 + 20 × 1.6 + 10 × 0.8 = 72

  • The number of students that revised for less than 45 minutes = <u>72 </u>students

Learn more about histograms here:

brainly.com/question/17139138

You might be interested in
How much is 2/3 × 5<br>​
djverab [1.8K]

<em>Answer:</em>

<em>Answer:3.33 </em>

<em>Answer:3.33 Step-by-step explanation:</em>

<em>The</em><em> </em><em>answer</em><em> </em><em>is</em><em> </em><em>3.33</em>

<em>2</em><em>/</em><em>3</em><em> × </em><em>5</em><em> = 3.33</em>

5 0
3 years ago
Read 2 more answers
A dinner platter is in the shape of a regular decagon. The platter has an area of 161 square inches and a side length of 4.6 inc
REY [17]

When I saw this, I said to myself  "Self !  We don't know anything about
decagons.", and then I went searching online for stuff about decagons.
This just goes to show how stupid I can be when I don't take a little time
to THINK before I go running around screaming.

-- When you draw all the lines from the center to the vertices of the
decagon, you'll have 10 little triangles.

-- The area of the whole thing is 161 square inches, so the area of each
little triangle is 1/10 of that . . . . . <em>16.1 square inches</em>.

-- The area of each little triangle is  (1/2) (base) (height), just like
every other triangle.
The base is the 4.6 inches of one side of the decagon.
              
                                                  Area = (1/2) (base) (height)

Multiply each side by 2:         2 x area = (base) x (height)

Divide each side by (base):  (2 x area) / (base) = height

                              Height = (2 x 16.1) / (4.6) =  <em>7 inches</em> .

Let that be a lesson to both of us.
THINK before you jump.


6 0
4 years ago
A Ski resort tracks the proportion of seasonal employees who are rehired each season. Rehiring a seasonal employee is beneficial
DaniilM [7]

The test statistic z will be equal to -0.946 and it shows that there is no significant difference in the proportion of rehires between full time and part time.

Given sample sizes of 833 and 386 and result of samples 434 and 189.

n_{1} =833,     n_{2}=386

Proportion  of full time=434/833=0.52

Proportion of part time=189/386=0.49.

Difference in proportion =0.52-0.49

H_{0}:TTF- i∈ rho=0

H_{1}: TTF+i∈ rho≠0.

Mean of difference=0.03

Z=(X-μ)/σ

σ=\sqrt{0.4517/447}

=0.0317

σ=0.0317

z=(0-0.03)/0.0317

=-0.03/0.0317

=-0.317

p value will be =0.1736.

Because p value is greater than 0.01 so we will accept the null hypothesis which shows that there is no significant difference in the proportions.

Hence there is no significant difference in the proportion of rehires between full time and part time.

Learn more about z test at brainly.com/question/14453510

#SPJ4

6 0
2 years ago
Evaluate the function f(x)=x+4 when x=3.
ella [17]
Since x=3 that means all of the x's would be 3's
4 0
3 years ago
Helppppppp.... I cant understand
vovikov84 [41]
6/25

Hope this helps (:
3 0
3 years ago
Read 2 more answers
Other questions:
  • Ms. Maya was handing out breakfast with Ms. Perez. They were in a race to see who could be most efficient and hand out the most
    13·1 answer
  • Help me solve for 14 and 15
    9·2 answers
  • ZE and ZF are vertical angles with mZE = 8x + 8 and mZF = 2x +38.<br> What is the value of x?
    6·2 answers
  • Azul has 4 green picks and no orange picks.You add orange picks so that there are 2 oranges picks for every 1 green pick.How man
    11·1 answer
  • Devi orders one bowl of ramen at a Japanese restaurant which offers an 18% discount.There is a service charge of 10% and GST is
    6·1 answer
  • Find the value of x.<br> please.
    10·2 answers
  • Consider equation 2x+7=5w-23
    11·1 answer
  • Solve the rational equation
    5·1 answer
  • Ten bags of rice cost ¢350. How many bags can ¢ 250 buy​
    5·2 answers
  • Use the zero product property to find the solutions to the equation (x 2) (x 3) = 12.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!