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
kirill [66]
3 years ago
15

Suppose that 5% of the time Todd attends a concert twice a month, 40% of the time he attends a concert once a month, and 55% of

the time he doesn't attend a concert at all in a given month. What is the expected value for the number of times Todd attends a concert during a month?
Mathematics
1 answer:
alexira [117]3 years ago
3 0
it’s the right answer anyways hope u pass all your classes thanks bye now purrr 1245/4849
You might be interested in
he gas mileage for a certain model of car is known to have a standard deviation of 4 mi/gallon. A simple random sample of 49 car
charle [14.2K]

Answer:

c) (26.295, 28.705)

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.965}{2} = 0.0175

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.0175 = 0.9825, so z = 2.11

Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

M = 2.11\frac{4}{\sqrt{49}} = 1.205

The lower end of the interval is the sample mean subtracted by M. So it is 27.5 - 1.205 = 26.295 mi/gallon

The upper end of the interval is the sample mean added to M. So it is 27.5 + 1.205 = 28.705 mi/gallon

So the correct answer is:

c) (26.295, 28.705)

5 0
4 years ago
In the diagram below of AACD, DB is a median to AC, and AB = DB.
SVETLANKA909090 [29]

Answer:

it will be (3)

Step-by-step explanation:

since DB is a median

then DB= half AC , AB=BC

then AB=BD

then the two triangles are isosceles

5 0
3 years ago
A farm is to be built in the shape of Quadrilateral ABCD, as shown below. All four sides are equal.
Ray Of Light [21]
1) 15.5 X 13.2 = 204.6
2)  204.6 ÷ 2 = 102.3
The answer is 102.3
6 0
3 years ago
Read 2 more answers
The population of a city increases by 3.1% per year. If this year's population is 119,000, what will next year's population be,
fredd [130]

Answer:

<u>The next year population is 122,689</u>

Step-by-step explanation:

<u>The computation of the next year population is as follows:</u>

<u>= This year population × increase percentage</u>

<u>= 119,000 × (1 + 0.031)</u>

<u>= 119,000 × 1.031</u>

<u>= 122,689</u>

<u>Hence, the  next year population is 122,689</u>

<u>The above formula is applied so that the correct value of the population could come</u>

<u>and the same is relevant</u>

- Hope this helped! ^ω^

3 0
3 years ago
The end of a house has the shape of a square surmounted by an equilateral triangle. If the length of the base is measured to be
sergij07 [2.7K]

Answer:

The area of the end is 1755.44 ft²

Therefore, the maximum error in calculating area of the end is 8.3592

Step-by-step explanation:

Consider the provided information.

The length of the base is measured to be 35 feet, with a maximum error in measurement of 1 inch,

1\ inch = \frac{1}{12}\ feet

The area of shape = Area of square + Area of equilateral triangle

A=x^2+\frac{\sqrt{3}}{4}x^2

Substitute x=35 in above.

A=(35)^2+\frac{\sqrt{3}}{2}\times (35)^2=1755.44

Hence, the area of the end is 1755.44 ft²

Differentiate A=x^2(1+\frac{\sqrt{3}}{4}) with respect to x as shown:

dA=2x\ dx(1+\frac{\sqrt{3}}{4})

Substitute dx =1/12 and x=35

dA=2(35)\ \frac{1}{12}(1+\frac{\sqrt{3}}{4})=8.3592

Therefore, the maximum error in calculating area of the end is 8.3592

6 0
3 years ago
Other questions:
  • Find the perimeter of the quadrilateral<br> If x= 2, the perimeter is____ imches
    11·2 answers
  • What is the difference between 97 and 79
    6·2 answers
  • Give example of solution to solve the equation 2x-7=5+x
    11·1 answer
  • Which of these expressions is equivalent to<br> 125q3 - 64?
    12·1 answer
  • 4) A rectangle as a length which is twice its width.
    13·1 answer
  • Help please ASAP !!!!! Due soon
    13·1 answer
  • Find the m 105<br> 24<br> 28
    15·1 answer
  • Expand x(4x+1) answer for this please
    10·2 answers
  • Find the exact length of the third side .
    5·1 answer
  • 50 pts if u anser this 4 me. thanks!
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!