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
Kay [80]
3 years ago
9

Oil change the shape of the distribution of the time required to get an oil change at a 10-minute oil-change facility is unknown

. however, records indicate that the mean time for an oil change is 11.4 minutes, and the standard deviation for oil-change time is 3.2 minutes.
(a to compute probabilities regarding the sample mean using the normal model, what size sample would be required?
(b what is the probability that a random sample of n = 40 oil changes results in a sample mean time of less than
10 minutes?
(c suppose the manager agrees to pay each employee a $50 bonus if they meet a certain goal. on a typical saturday, the oil-change facility will perform 40 oil changes between 10
a.m. and 12 p.m. treating this as a random sample, what mean oil-change time would there be a 10% chance of being at or below? this will be the goal established by the manager.
Mathematics
1 answer:
Svetradugi [14.3K]3 years ago
7 0
B I think I really hope this helps
You might be interested in
What sentence about markdowns and markups is true?
Eduardwww [97]
The answer is C.
<span>C. A markup has no limit, but a markdown is limited to 100% or less. </span>
8 0
3 years ago
Please need help in these 3 algebra questions !!!!
Marysya12 [62]

Answer:

\large\boxed{7.\ B.\ 8s^2+16s+1}\\\\\boxed{8.\ D.\ -15t^9u^{11}}\\\\\boxed{11.\ C.\ 3,\ -2}

Step-by-step explanation:

7.\\(3s^2+7s+2)+(5s^2+9s-1)=3s^2+7s+2+5s^2+9s-1\\\\\text{combine like terms}\\\\=(3s^2+5s^2)+(7s+9s)+(2-1)\\\\=8s^2+16s+1

8.\\(-3t^2u^3)(5t^7u^8)=(-3\cdot5)(t^2t^7)(u^3u^8)\qquad\text{use}\ a^na^m=a^{n+m}\\\\=-15t^{2+7}u^{3+8}=-15t^9u^{11}

11.\\n-the\ number\\\\n^2=n+6\qquad\text{subtract}\ n\ \text{and}\ 6\ \text{from both sides}\\\\n^2-n-6=0\\\\n^2+2n-3n-6=0\\\\n(n+2)-3(n+2)=0\\\\(n+2)(n-3)=0\iff n+2=0\ \vee\ n-3=0\\\\n+2=0\qquad\text{subtract 2 from both sides}\\n=-2\\\\n-3=0\qquad\text{add 3 to both sides}\\n=3

4 0
3 years ago
On vacation, you notice that a local taxi cab service offers rides with the following pricing: $1.80 for entering the cab plus $
Nesterboy [21]

Answer:

22 miles

Step-by-step explanation:

6 0
2 years ago
Find the radius of the circle. <br><br>6(x – 3)2 + 6(y + 7)2 = 216​
Fantom [35]

Answer:

radius=6

Step-by-step explanation:

7 0
3 years ago
Can someone please help me
lisov135 [29]

Answer:

5.83 or E

Step-by-step explanation:

Use Pythagorean theorem. 5^2+3^2=c^2 because the diameter is perpendicular it cuts the chord in half.

25+9=c^2  

34=c^2

5.83

8 0
3 years ago
Read 2 more answers
Other questions:
  • What is the area of the parallelogram ?
    8·2 answers
  • A cookie shop sells 5 different kinds of cookies. how many different ways are there to choose 16 cookies if (a) you pick at leas
    7·1 answer
  • What’s seven more than the quotient of a number and 2 is 10
    9·1 answer
  • I need help with this can you type what I need to type in
    11·1 answer
  • Michael has five different stocks that he watches on a daily basis. The table shows the change in each stock price in dollars at
    8·2 answers
  • Calculate 6.75% tax on $2,305. a. $15.56 b. $145.22 c. $146.14 d. $155.59
    13·2 answers
  • Why does it take 3 copies of 1/6 to show the same amount as 1/2
    9·2 answers
  • Distance around an unmarked circle can be measured (always, sometimes, never)
    9·2 answers
  • Simpifly f+ 1/4=-7/2
    9·2 answers
  • F (x) = x^2 + 4x; Find f (−7)
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!