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
Mila [183]
3 years ago
10

A set of middle school student heights are normally distributed with a mean of 150150150 centimeters and a standard deviation of

202020 centimeters. Darnell is a middle school student with a height of 161.4161.4161, point, 4 centimeters.
Mathematics
1 answer:
fomenos3 years ago
7 0

Complete question :

A set of middle school student heights are normally distributed with a mean of 150 centimeters and a standard deviation of 20 centimeters. Darnell is a middle school student with a height of 161.4 centimeters.

What proportion of student heights are lower than Darnell's height?

Answer:

0.716 (71.6%)

Step-by-step explanation:

Given that :

Mean, μ = 150

Standard deviation, σ = 20

Darnell's height, x = 161.4

(x < 161.4)

We obtain the standardized score, then find the proportion using a standard normal distribution ;

Zscore = (x - μ) / σ

Zscore = (161.4 - 150) / 20

Zscore = 11.4 / 20

Z = 0.57

P(Z < 0.57) = 0.71566 (Z probability calculator)

This means that about 0.716 (0.716 * 100% = 71.6%) of student's height are lower than 161.4 centimeters

You might be interested in
How would you determine the distance between (6,8) and (2,-3)
Leno4ka [110]

Answer:

negative slope

Step-by-step explanation:

3 0
3 years ago
The quadratic function h(t)= -16.t^2+150 models a ball’s height, in feet, over time, in seconds, after it is dropped from a 15 s
irga5000 [103]
At time 0 its height is -16(0)^2 + 150  = 150

Height from whick its dropped is 150 ft.
8 0
3 years ago
In ∆XYZ, m∠X = 152, y = 15, and z = 19. Find side x and the measure of angle Y to the nearest tenth
solong [7]

The measure of the side x is approximately 33 and the measure of angle Y is approximately 12.321°.

<h3>How to find a missing angle in a triangle by law of sine and law of cosine</h3>

In this problem we must apply the law of cosine and the law of sine to determine the angle Y:

<h3>Law of cosine</h3>

x = \sqrt{y^{2}+z^{2}-2\cdot y\cdot z\cdot \cos X}

x = \sqrt{15^{2}+19^{2}-2\cdot (15)\cdot (19)\cdot \cos 152^{\circ}}

x \approx 33

<h3>Law of sine</h3>

\frac{\sin Y}{y} = \frac{\sin X}{x}

Y = \sin^{-1}\left(\frac{y}{x}\cdot \sin X \right)

Y = \sin^{-1}\left(\frac{15}{33}\cdot \sin 152^{\circ} \right)

Y \approx 12.321^{\circ}

The measure of the side x is approximately 33 and the measure of angle Y is approximately 12.321°. \blacksquare

To learn more on triangles, we kindly invite to check this verified question: brainly.com/question/25813512

7 0
2 years ago
G(x)=9x-11 find g(8)
sineoko [7]

Answer:

Step-by-step explanation:

8(9x-11)

72x-88

6 0
3 years ago
A number has the digit 3 in the once place and the digit 4 in the tens place.which of these is another way to write this number?
Anarel [89]
The best way will be 40+3
3 0
3 years ago
Read 2 more answers
Other questions:
  • How to find the area of this parallelogram
    14·2 answers
  • The graph below shows the solution to a system of inequalities
    10·1 answer
  • What was the average speed in km/h of:
    9·1 answer
  • Please help me with this geometry question !!
    8·1 answer
  • an achers arrow follows a parabolic patch. the height of the arrow, f(x), in feet, can modeled by the function f(x)=-0.07x^2+1.5
    14·1 answer
  • Ratios and proportions quick quiz. Jules bought 6 pairs of shorts for 30$ at this rate what would the cost be for 8 pairs of sho
    14·1 answer
  • Plsss help i’ll give brainliest if you give a correct answer
    15·1 answer
  • Convert 301 to base 5
    14·1 answer
  • Which number is equivalent to 16 to the power of 1/2 ?
    6·2 answers
  • Find the distance between -6.77777 and 3.55555.
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!