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
Svetllana [295]
3 years ago
11

The length of a text messaging conversation is normally distributed with a mean of 2 minutes and a standard deviation of .5 minu

tes. What is the probability that a conversation lasts longer than 3 minutes?
0.043351
0.063748
0.02275
0.095424
Mathematics
1 answer:
Phoenix [80]3 years ago
6 0
Let x be a random variable representing the length of a text messaging conversation, then
P(x > 3) = 1 - P(x < 3) = 1 - P(z < (3 - 2)/0.5) = 1 - P(z < 2) = 1 - 0.97725 = 0.02275
You might be interested in
Find the cardinality of the set B = { 5, 6, 7, … , 100}
vaieri [72.5K]

The cardinality of the set B is given to be 96.

<h3>What is the cardinality of a set?</h3>

This is the term that is used to refer to the number of elements that a given set can be said to contain.

This is a set that has numbers that ranges from 5 to 100, this tells us that the numbers 1, 2, 3, 4 are excluded from the set.

Hence the total numbers excluded is 4. 100 - 4 = 96

Therefore from 5 to 100, the total 9 and the cardinality of the set B is 96.

Read more on the cardinality of a set here: brainly.com/question/23976339

#SPJ1

3 0
1 year ago
Which of the following is equivalent to the expression 2/5 divided by 4 ?
erik [133]

Answer:

C) 2/5×1/4

Step-by-step explanation:

Dividing by a number is the same by multiplying by the reciprocal of the number.

For Example:

1/2 divided by 3 would be the same as 1/2 x 1/3

So for this problem we are given that 2/5 is divided by 4 which would be the same as 2/5 multiplied by the reciprocal of 4 which is 1/4 and thus the answer is option C which is 2/5×1/4

5 0
2 years ago
Ms. Parker baked 6 dozen cookies. She gave 2 dozen cookies to her sister, 1 À dozen
Lyrx [107]

Answer:

Step-by-step explanation:

She gave out three dozen and she had six dozen so she has three dozen left three dozen 3 * 12 she has 36 cookies

6 0
3 years ago
13x12=[3x______]+[3x_____]+[10 x______]+[10x____]
Ray Of Light [21]

Answer:it's on the explanation

Step-by-step explanation:

3 x 1

3 x 1

10 x 5

10 x 9

6 0
3 years ago
Learning Theory Students in a psychology experiment were given an exam and then retested monthly with equivalent exams. The aver
forsale [732]

Answer:

Step-by-step explanation:

The average scores s (on a 100 point scale) for the students can be modeled by

s = 75 - 6 In(t + 1), 0 < t < 12

where t is the time in months.

a) Since the students were given an exam and then retested monthly with equivalent exams, then,

For the original exam, t = 0

Therefore,

s = 75 - 6 In(0 + 1) = 75 - 6 In1

s = 75 - 6 × 0 = 75

b) the average score after 4 months, t = 4

Therefore,

s = 75 - 6 In(4 + 1) = 75 - 6 In5

s = 75 - 9.66 = 65.34

c) s = 60

Therefore,

60 = 75 - 6 In(t + 1)

6 In(t + 1) = 75 - 60 = 15

In(t + 1) = 15/6 = 2.5

t + 1 = e^2.5 = 12.18

t = 12.18 - 1 = 11.18

t = 11 approximately

8 0
3 years ago
Other questions:
  • What is the slope of (-4,13) and (6,-2)​
    10·1 answer
  • Harry and Selma start driving from the
    9·1 answer
  • Which of the following represents the correct expansion of (x + 2)^5?
    13·1 answer
  • Apply the distributive property to create an equivalent expression.<br> −9⋅(5j+k)
    5·2 answers
  • Find the value of in the triangle shown below<br> 53°<br> 2<br> 97°
    11·1 answer
  • I need help please and thank you ;[
    8·2 answers
  • Find the measure of the indicated angle
    6·2 answers
  • Help me with this, Its in the doc below
    14·1 answer
  • Type the correct answer in the box.
    15·1 answer
  • 2. Put the following fractions in order of size, starting with the one with the least value:
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!