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
inna [77]
3 years ago
5

HELP ME PLZZ I AM GIVING 30 POINTS FOR THIS!!

Mathematics
1 answer:
m_a_m_a [10]3 years ago
5 0

Answer:

Option D

Step-by-step explanation:

because you have the ability to get 2/5 answers if it is supposed to be probable less than 3.

You might be interested in
in a given year, the rate of flu infection for the general public was 8.3%. And sample of 200 people who receive the flu vaccine
makkiz [27]

Answer:

\fbox{\begin{minipage}{10em}Option A is correct\end{minipage}}

Step-by-step explanation:

<em>Step 1: Define significance level</em>

In this hypothesis testing problem, significance levels α is selected: 0.05, the associated z-value from Laplace table:

Φ(z) = α - 0.5 = 0.05 - 0.5 = -0.45

=> z = -1.645

<em>Step 2: Define null hypothesis (</em>H_{0}<em>) and alternative hypothesis (</em>H_{1}<em>)</em>

H_{0} : rate of flu infection p = 8.3% or 8.3/100 = 0.083

H_{1} : rate of flu infection p < 8.3% or 8.3/100 = 0.083

<em>Step 3: Apply the formula to check test statistic:</em>

K = \frac{f - p}{\sqrt{p(1 - p)} } * \sqrt{n}

with f is actual sampling percent, p is rate of flu infection of H_{0}, n is number of samples.

The null hypothesis will be rejected if K < z

<em>Step 4: Calculate the value of K and compare with </em>z

K = \frac{(\frac{3.5}{100})  - 0.083}{\sqrt{0.083(1 - 0.083)} } * \sqrt{200} = -2.46  

We have -2.46 < -1.645

=>This is good evidence to reject null hypothesis.

=> The actual rate is lower. (As H_{1} states)

Hope this helps!

:)

5 0
3 years ago
Pls help me someone
Jet001 [13]

Answer:

cos(49) = x/50

Step-by-step explanation:

(The answer to the equation is 32.8)

8 0
3 years ago
Real life application of ratio and proportion???
motikmotik
Ratios and proportions tie into each other. A ratio in real life would be basically comparing two quantities, as a proportion would be solving for the similar ratio or the equal ratio to another. 
6 0
3 years ago
What is the answer to this math question?
oksano4ka [1.4K]

Answer:

The answer is option 3.

Step-by-step explanation:

First we have to find the area of both rectangle and triangle :

Rectangle,

area = base \times height

Let base = 9,

Let height = 3,

area = 9 \times 3 \\ area = 27 \:  {m}^{2}

Triangle,

area =  \frac{1}{2}  \times base \times height

Let base = 3,

Let height = 3,

area =  \frac{1}{2}  \times 3 \times 3 \\ area =  \frac{1}{2}  \times 9 \\ area =  \frac{9}{2}  \\ area = 4.5 \:  {m}^{2}

Lastly, in order to find the shaded region you have to substract the area of triangle from the area of rectangle :

area = 27 - 4.5 \\ area = 22.5 \:  {m}^{2}

5 0
3 years ago
Read 2 more answers
The sum of 69 and 42 is five more than the difference of 146 and a number. Calculate the value of the unknown number.
Len [333]
As an equation, we have:
69+42=5+(146-x)

You just have to simplify:

111=5+(146-x)
106=146-x
-40=-x
40=x

Your unknown number is 40
5 0
3 years ago
Other questions:
  • PLEASE HELP WILL GIVE BRAINLIEST
    13·2 answers
  • Factor 4y^2 - 4y - 20
    12·1 answer
  • What is the area of this triangle?
    13·2 answers
  • If you borrow $421 for nine years at an interest rate of 4%, how much interest will you pay
    15·1 answer
  • Draw a line with the given slope through the given point. <br><br> (-4,1) slope=3/5
    11·1 answer
  • Plant and animal cells have ALL the same organelles. True or faulse?
    6·2 answers
  • Find the area of the following trapezoid. 5 7 14<br>​
    10·2 answers
  • Can someone help me pls <br><br>use this idea to add 5x^2+2x+3: +2x^2+7x+1<br>​
    5·1 answer
  • Which expression has both eight and N factors
    14·1 answer
  • Solve for x: 2(x + 6) = 22
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!