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
sertanlavr [38]
3 years ago
15

Suppose that a customer service center claims that the telephone calls it recieves last 113 seconds on average, with a standard

deviation of 9 seconds. if you took a sample of 324 phone calls, which of the following mean times would be within the 95% confidence interval?
A. 116.5 seconds
B. 114.5 seconds
C. 113.5 seconds
D. 115.5 seconds
Mathematics
2 answers:
zimovet [89]3 years ago
8 0

Answer: 113.5 sec

Step-by-step explanation:

Apex 2019

atroni [7]3 years ago
3 0

Answer:

113.5 seconds

Step-by-step explanation:

You might be interested in
Which expression is equivalent to cos 120°?
ryzh [129]

Answer:

cos 120° = -1/2

Step-by-step explanation:

cos 120° =  (adjacent side) / (hypotenuse.

Here the adjacent side (the side next to the central angle in this 30-60-90 triangle) is -1.  Then the hypotenuse is 2 and the opposite side is √3.

Thus, cos 120° = -1/2

4 0
3 years ago
To obtain the graph of y = (x - 8)2, shift the graph of y = x2 units.
zvonat [6]

Answer:

Right, 8

Step-by-step explanation:

Edge

8 0
4 years ago
Read 2 more answers
Help please I’m being timed!!
lisov135 [29]

Answer:d

Step-by-step explanation:

5 0
3 years ago
Please explain your answer. Thank you!
Liula [17]

Answer:

C

Step-by-step explanation:

Let length of rectangle be "l"

Let width of rectangle be "w"

We know,

LENGTH is 2 MORE THAN WIDTH, we can write:

l = w + 2

Also, note the perimeter is the sum of all 4 sides of a rectangle, thus:

length + width + length + width

Now,

The perimeter is given as 72, so we can write:

l + l + w + w = 72

2l + 2w = 72

We have 2 equations that we need to solve and find the length (l).

The first equation is:

l = w + 2

Rearranging, we have:

w = l - 2

We put this into 2nd equation and find the value of l:

2l + 2w = 72\\2l + 2(l-2) = 72\\2l+2l-4=72\\4l-4=72\\4l=76\\l=\frac{76}{4}\\l=19

The length is 19 meters, the correct answer is C

3 0
4 years ago
Choose the number that is composite.<br><br><br> A. 2<br> B. 21<br> C. 31<br> D. 17
Stella [2.4K]
A composite number has more than two factors. (B) 21 is a composite number because the factors of 21 are 7 × 3.
6 0
3 years ago
Other questions:
  • Which is the biggest fraction?<br><br> 2/4<br><br> 2/3<br><br> 4/5<br><br> 4/6
    8·1 answer
  • 5 - 3/13.<br> A. 1 2/3<br> B. 2 2/3<br> C. 3 1/3<br> D. 2 1/3
    11·1 answer
  • Mrs. Robinson bought a novel at a bookstore on sale for 20% off its regular price of $29.99. Mr. Chang bought the same novel at
    7·2 answers
  • Bought large bag of seed and used 24% of bag. How many pounds in original bag if 15.2 pounds left?
    8·1 answer
  • Jeffrey bought t T-shirts. The shirts came in 4 packages. Write an expression that shows how
    8·1 answer
  • How to find the perimeter and area of each shape
    11·2 answers
  • Think about tossing two coins.
    5·1 answer
  • pls help me i need your help thank you soo much pls don't waste someone's change of answer I need this to pass this class
    7·1 answer
  • Calculate Mechanical Advantage To lift a crate, a pulley system exerts a force of 2,750 N. Find the mechanical advantage of the
    6·1 answer
  • The area of a rectangular room is 750 square feet. The width of the room is 5 feet less than the length of the room.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!