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
Sveta_85 [38]
4 years ago
8

Most sample surveys use random digit dialing equipment to call residential telephone numbers at random. the telephone polling fi

rm zogby international reports that the probability that a call reaches a live person is 0.15. calls are independent. (a) a polling firm places 7 calls. what is the probability that none of them reaches a person?
Mathematics
1 answer:
True [87]4 years ago
4 0
The probability is 0.3206.
 
Since the probability of reaching a live person is 0.15, the probability of not reaching someone is 1-0.15=0.85.  

The probabilities are independent, which means to find the probability of not reaching anyone on all calls we find (0.85)^7= 0.3206.
You might be interested in
How do I solve this? ​
Ainat [17]

Answer:

pythagoren therom, law of sine, cosine, and tangent

Step-by-step explanation:

6 0
3 years ago
Factor the expression completely.
RSB [31]

 -9.75 + 3.25x

= -3.25(3) + 3.25(x)

= -3.25(3)  -  -3.25(x)     <em>notice they have the same factor of -3.25</em>

= -3.25(3 - x)

Answer: A


3 0
3 years ago
Value of x<br><br>30x=30-30​
Vladimir79 [104]

Answer:

<h2>0</h2>

Step-by-step explanation:

30x = 30 - 30

=  > 30x = 0

=  > x =  \frac{0}{30}

=  > x = 0

5 0
3 years ago
Read 2 more answers
Which answer choice shows 4 + 0.3 + 0.09 written in standard form?A.43.9B.4.39C.0.439D.0.0439
Oliga [24]

Place values:

As each is in a different place value, when we add them neither will affect the other, meaning:

4+0.3+0.09=4.39

Answer: B 4.39

5 0
1 year ago
1. Wendy wants to find the width, AB, of a river. She walks along the edge of the river 300 ft and marks point C. Then she walks
Ierofanga [76]

It can be deduced that the triangles are similar because the three internal angles are equal for both triangles.

<h3>How to solve the triangle?</h3>

It should be noted that the triangles are similar because the three internal angles are equal.

In this case, the ratio of the corresponding sides are equal and the corresponding angles are congruent.

The width of the river will be:

300/80 = AB/50

AB = (300 × 50)/80

AB = 187.50 feet.

Learn more about triangles on:

brainly.com/question/17335144

7 0
3 years ago
Other questions:
  • Is the ordered pair (-2, 9) a solution of the equation y = x – 7?
    15·2 answers
  • Nine less than two times a number is no less than the sum of five times the number and two
    10·1 answer
  • Increase 48m by 20% ??????????????????????????////
    12·2 answers
  • The sales price of a car is 12,590 which is 20% off the original price what is the original price
    12·1 answer
  • A sporting equipment company wants to sell a new bicycle helmet. They have developed a function, shown below, where total profit
    8·1 answer
  • Veronica surveyed her classmates about which types of pets they own. The graph shows her data.
    6·1 answer
  • Can someone help me??
    5·1 answer
  • In the diagram below, AB is parallel to CD. What is the value of y?
    10·1 answer
  • A pair of parallel lines is cut by a transversal<br> What are the measures of the two marked angles?
    8·1 answer
  • The spin and dine restaurants ice cream for dessert Chloe actually won a bet and gets to spin two spinners disliked one random f
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!