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
xeze [42]
3 years ago
5

A town has three fire engines operating independently. The probability that a specific engine is available when needed is 0.86.

​(a) What is the probability that no fire engine is available when​ needed? ​(b) What is the probability that a fire engine is available when​ needed?
Mathematics
1 answer:
kicyunya [14]3 years ago
7 0

Answer:

Part a : 0.002744

Part b : 0.997256

Step-by-step explanation:

The probability that a specific engine is available when needed is 0.86.

So, The probability that fire engine will not be available when​ needed = 1-0.86=0.14

(a)

The probability that no fire engine is available when​ needed =

0.14^{3}

= 0.002744

(b)

p(at least one available) = 1-0.002744

= 0.997256

You might be interested in
Use matrix addition to solve this equation: B + 15 −7 4 0 1 2 = 1 2 12 4 0 2 b11 = b12 = b13 = b21 = 4 b22 = −1 b23 = 0
Arada [10]

Answer:

b_{11}=-14,b_{12}=9,b_{13}=8,b_{21}=4,b_{22}=-1,b_{23}=0

Step-by-step explanation:

The given matrix addition is

B+\begin{bmatrix}15&-7&4\\ 0&1&2\end{bmatrix}=\begin{bmatrix}1&2&12\\ 4&0&2\end{bmatrix}

We need to find the elements of matrix B.

Let B=\begin{bmatrix}b_{11}&b_{12}&b_{13}\\ b_{21}&b_{22}&b_{23}\end{bmatrix}

Substitute the value of matrix.

\begin{bmatrix}b_{11}&b_{12}&b_{13}\\ b_{21}&b_{22}&b_{23}\end{bmatrix}+\begin{bmatrix}15&-7&4\\ 0&1&2\end{bmatrix}=\begin{bmatrix}1&2&12\\ 4&0&2\end{bmatrix}

After addition of two matrix we get

\begin{bmatrix}b_{11}+15&b_{12}-7&b_{13}+4\\ b_{21}+0&b_{22}+1&b_{23}+2\end{bmatrix}=\begin{bmatrix}1&2&12\\ 4&0&2\end{bmatrix}

On equating both sides.

b_{11}+15=1\Rightarrow b_{11}=-14

b_{12}-7=2\Rightarrow b_{12}=9

b_{13}+4=12\Rightarrow b_{13}=8

b_{21}+0=4\Rightarrow b_{21}=4

b_{22}+1=0\Rightarrow b_{22}=-1

b_{23}+2=2\Rightarrow b_{23}=0

Therefore, the elements of matrix B are b_{11}=-14,b_{12}=9,b_{13}=8,b_{21}=4,b_{22}=-1,b_{23}=0.

3 0
3 years ago
Joe biked the following distances this past week to train for a triathlon. Joe biked 37 miles, 88 miles, 44 miles, 54 miles, 62
Artyom0805 [142]

Answer:

The median is 50.

Step-by-step explanation:

First you put all the numbers in order. (37, 44, 46, 54, 62, 88) then you look for the middle number. Since there is two middle numbers, you add them together then divide it by 2.

So 46+54= 100

100/2= 50

8 0
2 years ago
Worth 15 points with give brainiest if correct please help​
valkas [14]

Answer:

looks like its 4

Step-by-step explanation:

7 0
3 years ago
Which statement is true about the result of a rigid transformation?
Ulleksa [173]
I think the answer is a
6 0
3 years ago
Please help me if you love your mom
kari74 [83]

Answer:

10.2 cm²

Step-by-step explanation:

regular hexagon made up of six equilateral triangles

A = (2 × 1.7) /2 × 6 = 10.2

or by the side length

A = 3√3/2 * 2² = 10.3

8 0
3 years ago
Other questions:
  • The perimeter of a square is 1/5 meter. Find the length of each side in meters .How long is the side in centimeters
    6·1 answer
  • A water park charges a rental fee plus $1.50 per hour to rent inflatable rafts. The total cost to rent a raft for 6 hours is $15
    14·2 answers
  • For a continuous random variable x, the probability density function f(x) represents
    6·1 answer
  • What is<br> 2x + 8 - 22x = -2
    7·1 answer
  • Hello , I need help please and thank you very important
    5·2 answers
  • Asap...?<br><br> anyone.....?
    8·2 answers
  • Find the inequality please
    13·1 answer
  • Simplify completely -1/2(6n + 4) + 2n <br><br> (!! NEED BY 1/29/20!!)
    10·1 answer
  • PLZ HELP HURRY??!!!​
    6·1 answer
  • What is 52% of 475?<br><br> Help please
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!