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
loris [4]
2 years ago
10

The lifetimes of light bulbs of a particular type are normally distributed with a mean of 350 hours and a standard deviation of

6 hours. What percentage of the bulbs have lifetimes that lie within 1 standard deviation to either side of the mean?
Mathematics
1 answer:
musickatia [10]2 years ago
5 0

Answer:

By the Empirical Rule, approximately 68% of the bulbs have lifetimes that lie within 1 standard deviation to either side of the mean.

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

Approximately 68% of the measures are within 1 standard deviation of the mean.

Approximately 95% of the measures are within 2 standard deviations of the mean.

Approximately 99.7% of the measures are within 3 standard deviations of the mean.

What percentage of the bulbs have lifetimes that lie within 1 standard deviation to either side of the mean?

By the Empirical Rule, approximately 68% of the bulbs have lifetimes that lie within 1 standard deviation to either side of the mean.

You might be interested in
Round 418 to the nearest ten.
marissa [1.9K]

Answer:

The answer should be 420.

~

Step-by-step explanation:

7 0
2 years ago
What would this be?:)
Mnenie [13.5K]

Answer:

\d

Step-by-step explanation:

:)

3 0
3 years ago
Need help urgently difficult but simple math equation if you get it right ill give you brainliest.​
Zielflug [23.3K]

Answer:

No.

Step-by-step explanation:

Explanation below.

6 0
3 years ago
14. Find mMK please :)
MrRissso [65]

Answer:

Step-by-step explanation:

11) strategy:  since they tell us. indirectly,  that the length of  JK is the same as LM then we can set those two equal, solve for X  and then.. when we have X we can figure out the lenght of JK  and LM and then just divide that by 2 go get PK  ( :0 Player Killer ???  no , not that PK)    

solve JK and LM

3x + 23 =9x-19

42 = 6x

7 = x

now that we know x = 7 plug it into either equation to come up with the length of JK or LM .  I'll pick JK just b/c it was 1st

3(7) + 23 = JK

21+23 = JK

44 = JK

now take half of 1/2*JK= 22  that is PK    ( are you sure that 's not player killer?)

PK = 22

12) strategy: set the two arcs BG and GC equal and solve for X, then plug x into either equation and the multiply the answer by 2 to find arc AB

9x-20 = 5x + 28

4x = 48

X = 12

9(12) -20 = BG

88 = BG

2*88 + AB

176 = AB

13) done

14)  strategy: find the angle at L,  and that will also be the arc of MK

<em>copy and past the below</em> helpful trig functions into your computer

Use SOH CAH TOA to recall how the trig functions fit on a triangle

SOH: Sin(Ф)= Opp / Hyp

CAH: Cos(Ф)= Adj / Hyp

TOA: Tan(Ф) = Opp / Adj

<em>copy and past the above</em> :

use which ever trig function you want , we have all the sides of the triangle, I'll use CAH

Cos(Ф) = 9/15

Ф = arcCos(9/15)

Ф = 53.13010°

arc MK = 53.13010°

15)   strategy:  arc JK is just 2 times MK

2*MK = 106.26020°

arc MK = 106.26020°

16) find arc JPK   strategy:  JPK is just the remaining part of a full circle of 360 - MK  = 253.7397°

arc JPK = 253.7397°

7 0
2 years ago
A quarter has a diameter of 24 mm.
Whitepunk [10]

Answer:

C or D

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • Find 6 times as many as 2 divided by 6
    6·2 answers
  • Write x2 - 12x + 8 in vertex form.
    10·1 answer
  • If 5 bulbs are $24.95 how much money is 1 bulb?
    8·1 answer
  • Solve for x: 14-14x^1/3 =2
    7·1 answer
  • Which of the following are equal to 14.95? 2.3 × 6.5 21.45 − 6.5 8.32 + 6.63
    8·1 answer
  • If 5 gallons of gas cost $17.50, what is the unit price of the gas
    5·2 answers
  • What is the value, after 7 years, of a 2014 Ford Mustang that originally cost $25,000.00 if the depreciate at a rate of 8% per y
    8·2 answers
  • Given m||n, find the value of x.<br> t<br> (x-3)<br> m<br> (8x+3)
    10·2 answers
  • According to a survey of workers, 5/25 of them walk to work, 1/25 bike, 4/25 carpool, and 15/25 drive alone. What percent of wor
    8·1 answer
  • Can someone explain this step by step please
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!