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
iren [92.7K]
3 years ago
10

The porch light is an automatic switch that will start turning on at 19.00 - 19.30 or 20.00 - 21.00 at random. The lights will a

utomatically go out at some point in time between 04:00 and 06:00 in the morning. Suppose it is known that tonight the light is on for t hours, the probability that the light is on for 9 < t < 10 hours is ...
Mathematics
1 answer:
NeTakaya3 years ago
7 0
  • Turning on time be x
  • Turning of time be y

If 19:00<=x<=19:30 and 4:00<=y<=6:00

Total time difference

\\ \sf\longmapsto 6:00-19:30=10:30

  • In order to mange time between 9--10 hours 30 minutes should be deducted in pairs from starting and ending .By which net deduction i e x-y=0

  • Total starting options=x=15
  • Total ending options=x=15
  • Sample space=|S|=15+15=30
  • E=1

Probability=

\\ \sf\longmapsto P(E)=\dfrac{1}{30}

You might be interested in
A right angle has an area of 13m*2. The dimensions of the triangle are increased by a scale factor of 3. What is the area of the
Alex_Xolod [135]

The answer is: 117m²

The explanation is shown below:

1. You have the following information given in the problem:

- The triangle has an area of 13 m².

- The dimensions of the triangle are increased by a scale factor of 3.

2. Therefore, to solve the exercise you must multiply the area by 3^{2}=9, as following:

A=(13m^{2})(9)\\A=117m^{2}

5 0
4 years ago
-6 3/5 - (-7 4/15) + 2 1/5
Ilya [14]

Answer:2.87

Step-by-step explanation:

3 0
3 years ago
1
Scilla [17]

Answer:

124.51%

Step-by-step explanation:

In this problem, we are expected to solve for the percentage change, given the opening  point and the closing point

given that the low is 4014

and the high is  9012

the formula to calculate the percentage change is given as

%change= (high-low)/low*100

substituting our given data we have

%change= (9012-4014)/4014*100

%change= (4998)/4014*100

%change= (1.2451)*100

%change= 124.51%

The total change in the stock market from the beginning of the day to the end of the day is 124.51%

hope this helps

sorry if wrong

#Virgo2007

4 0
3 years ago
How much of the circle is shaded? write your answer as a fraction in simplest form 7/3 and 1/4​
liberstina [14]

Answer:

7/24

Step-by-step explanation:

Let

x-----> the shaded area

we know that

x+\frac{1}{3}+\frac{3}{8}=1

Because the complete circle represent the 100\%

and

4 0
3 years ago
A garrison of 120 people had provisions for 30 days. If 20 people leave the garrison after 10 days, how long does the remaining
stiv31 [10]

Answer:

24 days

total units = 120* 30 = 3600

used after 10 days =  120*10 = 1200

remaining units after 10 days = 3600-1200 = 2400

2400/100 people = 24 days that the provisions will last

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • Please help!!!!!!!!!!!
    10·1 answer
  • Solve the system of equations y=x^2+3x-4 and y=2x-4
    7·1 answer
  • If x equals 12 and y equals 9 find the value of 2 x - 2y
    11·1 answer
  • Which table of values contains only points that lie on the line represented by this equation?​
    8·1 answer
  • PLEASE HELP ME PLEASE !
    6·1 answer
  • Blueberries cost $4 per pound for each question explain how you show your reasoning music table to help you organize information
    5·1 answer
  • A rectangle measures 2 1/2 meters by 1 3/4 meters. What is its area?
    10·1 answer
  • Which equation represents the parabola shown on the
    10·2 answers
  • In ⊙O, ST and VT are tangents. m∠STV = 22°. Find the value of a, b, and m∠SOV.
    13·1 answer
  • Factor the trinomial<br> 10x^2+11X-6
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!