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
GenaCL600 [577]
3 years ago
5

The physical plant at the main campus of a large state university recieves daily requests to replace fluorescent lightbulbs. The

distribution of the number of daily requests is bell-shaped and has a mean of 45 and a standard deviation of 3. Using the empirical rule, what is the approximate percentage of lightbulb replacement requests numbering between 42 and 45?
Do not enter the percent symbol.
ans = %
Mathematics
1 answer:
faltersainse [42]3 years ago
5 0

Answer:

34%

Step-by-step explanation:

Given that the distribution of daily light bulb request replacement is approximately bell shaped with ;

Mean , μ = 45 ; standard deviation, σ = 3

Using the empirical formula where ;

68% of the distribution is within 1 standard deviation from the mean ;

95% of the distribution is within 2 standard deviation from the mean

Lightbulb replacement numbering between ;

42 and 45

Number of standard deviations from the mean /

Z = (x - μ) / σ

(x - μ) / σ < Z < (x - μ) / σ

(42 - 45) / 3 = -1

This lies between - 1 standard deviation a d the mean :

Hence, the approximate percentage is : 68% / 2 = 34%

You might be interested in
Please helped this is for my math final.
hammer [34]

Answer:

[-8,8]

Step-by-step explanation:

6 0
2 years ago
A backpack is on sale for 30% off. If the sales price is $15.75, what is the original price?
Kryger [21]

Answer:

Your answer is 16.05

Step-by-step explanation:

15.75 + 0.3 = 16.05

16.05 - 0.3 = 15.75

5 0
3 years ago
A motorcycle breaks down and the rider has to walk the rest of the way to work. The motorcycle was being driven at 45 mph and th
UNO [17]

Answer:26 mile

Step-by-step explanation:

5 0
3 years ago
Kamilah noticed that three different-sized boxes of the same cookies were on sale at a grocery store. The 425 g box was on sale
KengaRu [80]

Answer:

740 g box for $4.88, hope this helps

3 0
2 years ago
What is the value of X?<br> A: x=18<br> B: x=48<br> C: x=82<br> D: x=98
snow_tiger [21]

The two given angles when added together needs to equal 180 degrees ( straight line)

X + 34 + 2x + 2 = 180

Combine like terms:

3x +36 = 180

Subtract 36 from both sides:

3x = 144

Divide both sides by 3:

X = 48

The answer is B.

5 0
3 years ago
Read 2 more answers
Other questions:
  • Given the function f(x), whose graph is shown below, place the black draggable dot at the point that corresponds to f−1(−4).
    9·1 answer
  • The average length of a female dolphin is about 135 inches what is the length in feet and inches
    5·2 answers
  • What is the coefficient in the expression 5x^2+3
    11·2 answers
  • For the equation 17h + 6 = 40, select the appropriate property of equality to move the constant term to the right
    11·1 answer
  • Find the volume of the following cylinder. 10cm h=11cm
    9·1 answer
  • Give an example for a pair of alternate interior angles, a pair of corresponding angles, and a pair of alternate exterior angles
    5·1 answer
  • Alina is able to swim at a rate of about 2.5 miles per hour. Talia is able to swim at a rate of 1.8 meters per second. Which sta
    6·2 answers
  • You want to to buy the PlayStation 5 and it is listed as $449.99 in all the stores
    9·1 answer
  • Find the value of x and y in the triangle below.<br><br> Value of X:<br> Value of Y:
    10·1 answer
  • If the cost of 9 m cloth is rupees 378, find the cost of 4 m cloth? guys little fast and please in steps no direct answers
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!