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
Aleksandr [31]
3 years ago
13

When an opinion poll selects cell phone numbers at random to dial, the cell phone exchange is first selected and then random dig

its are added to form a complete telephone number. When using this procedure to generate random cell phone numbers, approximately 55%55% of the cell numbers generated correspond to working numbers. You watch a pollster dial 1515cell numbers that have been selected in this manner.What is the mean number of calls that reach a working cell number?A. 0.550.55B. 1515C. 8.258.25D. 3030
Mathematics
1 answer:
Sav [38]3 years ago
6 0

Answer:

A

Step-by-step explanation:

When an opinion poll selects cell phone numbers at random to dial, the cell phone exchange is first selected and then random digits are added to form a complete telephone number. When using this procedure to generate random cell phone numbers, approximately 55%55% of the cell numbers generated correspond to working numbers. You watch a pollster dial 1515cell numbers that have been selected in this manner.What is the mean number of calls that reach a working cell number?A. 0.550.55B. 1515C. 8.258.25D. 3030

You might be interested in
Is the inequality always, sometimes or never true?
statuscvo [17]
In order to understand if the inequalities are always, never or sometimes true, you need to perform the calculations:

A) <span>9(x+2) > 9(x-3)
9x + 18 > 9x - 27
the two 9x cancel out and you get:
+18 > -27
which is always true.

B) <span>6x-13 < 6(x-2)
6x - 13 < 6x - 12</span> 
</span><span>the two 6x cancel out and you get:
- 13 < -12
which is always true

C) </span><span>-6(2x-10) + 12x ≤ 180
-12x +60 +12x </span>≤ 180
-12x and +<span>12x cancel out and you get:
60 </span><span>≤ 180
which is always true.

All three cases are always true.</span>
3 0
3 years ago
What is <br> 5(2x+1)=4-2(4x-5)
Butoxors [25]

Answer:

x=0.5

Step-by-step explanation:

4 0
3 years ago
Answerrr pleaseeeeeeeeeeeee
erastova [34]
There were 7 people
3 0
3 years ago
Evaluate the expression:<br><br> for y = 2 + 3x when x=4. What does y=?
lora16 [44]

Answer:

y = 14

Step-by-step explanation:

Plug in 4 as x into the equation:

y = 2 + 3x

y = 2 + 3(4)

Simplify:

y = 2 + 12

y = 14

So, when x = 4, y = 14.

4 0
3 years ago
D 2.<br> The sum of 3x2 – 8x – 2 and 4x – 2 is
maw [93]

Answer:

3x^2 -4x -4

Step-by-step explanation:

3x^2 – 8x – 2 + 4x – 2

Combine like terms

3x^2 -8x+4x -2 -2

3x^2 -4x -4

8 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following sets of ordered pairs represents a function?
    11·2 answers
  • PLEASE HELP&gt;....
    14·2 answers
  • Twelve to the second power plus x to the second power equals twenty to the second power
    6·2 answers
  • A letter is randomly chosen from the word candlestick.find the probability
    5·2 answers
  • the average length of a female white pink dolphin is about 111 inches what is the length in feet and inches
    7·2 answers
  • 1 quart= 4cups=1.96, Each cup coat?
    11·1 answer
  • HELPPP!!! ASAPPP!! PLEASE!! WILL GIVE EXTRA POINTS!!
    6·1 answer
  • Which of the following equations would produce a parabola? Check all that apply. –5x^2 + 4x – 7y + 14 = 0 –x^2 + 6x + y2 – 8 = 0
    12·2 answers
  • Carlos is helping his grandfather paint the patio in their backyard. What is the area of the patio?
    6·1 answer
  • 3. A circular running track is 14 mile long. Elena runs on this track, completing each lap in 120of an hour. What is Elena’s run
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!