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
Ivanshal [37]
2 years ago
10

For an outdoor concert by the city​ orchestra, concert organizers estimate that 17,000 people will attend if it is not raining.

If it is​ raining, concert organizers estimate that 4,000 people will attend. On the day of the​ concert, meteorologists predict a 70​% chance of rain. Determine the expected number of people who will attend this concert.
Mathematics
1 answer:
atroni [7]2 years ago
8 0

Answer:

Expected number of people in concert = 7900 people

Step-by-step explanation:

We have given,

In an concert,

if it's not raining , number of people will attend concert = 17000 people

If it's raining , then number of people will attend concert = 4000 people

Since, probability of raining = 70% = 0.7

Then probability of not raining = 30% = 0.3

So,

Expected number of people in concert = 0.3 * 17000 + 0.7 * 4000

Expected number of people in concert = 5100 + 2800

Expected number of people in concert = 7900 people

You might be interested in
Let f(x) be a func. satisfying f(-x)=f(x) for all real x.if f"(x) exist, find its value.
OverLord2011 [107]

Answer:

f''(x)=f''(-x)

Step-by-step explanation:

A function satisfying the equation f(x)=f(-x) is said to be an even function. This denomination comes from the fact that the same relation is satisfied for functions of the form x^{n} with n even. Observe that if f is twice differentiable we can derivate using the chaing rule as follows:

f(x)=f(-x) implies f'(x)=f'(-x)\cdot (-1)=-f'(-x)

Applying the chain rule again we have:

f'(x)=-f'(-x) implies f''(x)=-f''(-x)\cdot (-1)=f''(-x)

So we have that function f''(x) is also an even function.

4 0
3 years ago
Brandy took 3 friends out for dinner. The cost of the meal was 46.15 she left the 20% tip what was the total cost including the
slega [8]

Answer: $55.35


Step-by-step explanation:

if the bill is $46.15, round it up to $46. Twenty percent of that is $9.20, found by moving the decimal point one place left. Add $9.20 to $46.15, and you get $55.35

i hope this is correct and it helps :)

8 0
2 years ago
-3x+10y=-60<br> 3x+5y=15
Verdich [7]

Answer:

x=10, y=-3

Step-by-step explanation:

solve by addition/elimination

6 0
2 years ago
Alvin has $30 and is saving $10 per week. Buzzy has $10 and he saves $15 per week. Both are saving for a guitar that costs $225
mihalych1998 [28]
It takes alvin 20 weeks, and it takes buzzy 15 weeks
8 0
2 years ago
Read 2 more answers
solve for x. round your answer to two decimal places. show your work for full credit. a right triangle is shown with the hypoten
Molodets [167]
I hope this helps you

3 0
2 years ago
Other questions:
  • How do I work out "The beam from a lighthouse reaches a distance of 8 kilometers and spreads to an angle of 35 degrees. Calculat
    11·1 answer
  • In triangle ABC, m∠ABC = (4x – 12)° and m∠ACB = (2x + 26)°. Yin says that if x = 19, the triangle must be equilateral. Is he cor
    13·2 answers
  • What is f(x)=-3(x+1)(x+1) in standard form
    11·1 answer
  • When x=12, y=8. Find x when y=12
    5·1 answer
  • What is 34 divided by 2,231 and 68 divided by 2,015
    9·1 answer
  • What is the relationship between the sine and cosine of complementary angles? a They are the same. b They are reciprocals. c The
    5·1 answer
  • Which function matches the<br> graph?
    7·1 answer
  • A room is 12 CM long and 8 m broad. find the ratio of i) length to breadth II) breadth to length​
    13·1 answer
  • The Hickory Stick has a selection of 3 meats and 6 vegetables. How many different selections of one meat and one vegetable are p
    11·1 answer
  • a fast food restaurant sold 63 burgers with cheese. if the ration of burgers sold with cheese compared to without cheese was 7 :
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!