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
mote1985 [20]
3 years ago
11

Question 8 options:

Mathematics
1 answer:
shusha [124]3 years ago
4 0

Answer:

volume of cone=1/3 πr²h=1/3 ×π×5²×15=125πcm³

You might be interested in
Select all the correct answers. the square of a number is 3 less than four times the number. which values could be the number?
Nimfa-mama [501]

The given expression "the square of a number is 3 less than four times the number" is represented as x² = 3 - 4x and the values of number could be: x1= 0.645 , x2= -4.645

In mathematics, when we refer "square of a number" we mean that the exponent of that number is 2. So we express it mathematically as:

x²

When we express "3 less than" of a number we mean that the number 3 is subtracting that number. So we express it mathematically as: 3 -

x² = 3 -

When we express "four times the number" we mean that the number is exactly 4 times greater than a number or that it contains it 4 times. So we express it mathematically as: 4x

x² = 3 - 4x

Organizing the values, we have a quadratic equation: x² + 4x – 3 = 0

Where:

  • a=  1
  • b= 4
  • c= -3

Solving the quadratic question we get the values for the (x) number

x= {- b ± √ [b² - (4* a*c)]} / (2 *a)

x= {- 4 ± √ [4² - (4* 1*-3)]} / (2 * 1)

x= {- 4 ± √ (16 + 12)} / 2

x= {- 4± √ 28} / 2

x= (- 4 ± 5.29 ) / 2

x1= (- 4 + 5.29 ) / 2

x1= (1,29) / 2

x1= 0.645

x2= (- 4 - 5.29 ) / 2

x2= (9.29) / 2

x2= -4.645

We can check the values, replacing them into the equation:

(x1)² = 3 - 4(x1)

(0.645)² = 3 - 4*(0.645)

0.42 = 0.42

(x2)² = 3 - 4(x2)

(-4.645)² = 3 - 4*(-4.645)

21.58 = 21.58

<h3>What is a quadratic equation?</h3>

It is an algebraic equation where the polynomial formed has three terms, one variable has an exponent 2, another in which the variable has exponent 1 and the last term without any variable. Its standard form is:

ax²+ bx + c = 0

Learn more about quadratic equation at: brainly.com/question/25841119 and brainly.com/question/7784687

#SPJ4

3 0
1 year ago
How to determine if polynomial is factoriable?
Andru [333]
If you have a maybe text book look in there it may give you the answer
3 0
3 years ago
2. Rainey graphed a function with exponential growth and an initial value of 15. Which of the following could represent the equa
Mars2501 [29]

Exponential equation are functions defined by y =ab^x

The equation that could represent Rainey graph must take the form y =15b^x

<h3>How to determine the equation</h3>

An exponential equation is represented as:

y =ab^x

Where:

  • a represents the initial value
  • b represents the rate

The initial value (a) is 15.

So, the equation becomes

y =15b^x

The graph is not given;

So, the equation cannot be determined.

Assume that the rate is 2.

Then the function would be: y =15(2)^x

Read more about exponential functions at:

brainly.com/question/11464095

6 0
2 years ago
How many years will it take James to recover his investment?
My name is Ann [436]
I don’t think anyone knows this one not even James
6 0
2 years ago
Assume that a computer was used to generate the given confidence interval for the population mean. Find the sample mean or margi
stealth61 [152]

Answer:

The sample mean is

b.3.55

The margin of error is

0.32

Step-by-step explanation:

Deep explanation about a confidence interval

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

\alpha = \frac{1-0.9}{2} = 0.05

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 1-0.05 = 0.95, so z = 1.645

Now, find 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 = 1.645*215 = 353.675

The lower end of the interval is the mean subtracted by M. So it is 6.4 - 0.3944 = 6.01 hours.

The upper end of the interval is the mean added to M. So it is 6.4 + 0.3944 = 6.74 hours.

In this problem:

The deep explanation is not that important.

We just have to recognize that the interval has a lower end and an upper end. The distance from both the upper and the lower end to the mean is M. This means that the sample mean is the halfway point between the lower end and the upper end.

The margin of error is the distance of these two points(lower and upper end) to the mean.

In our interval

Lower end: 3.23

Upper end: 3.87

Sample mean

M = \frac{3.23 + 3.87}{2} = 3.55

So the correct answer is:

b.3.55

The margin of error is

3.87 - 3.55 = 3.55 - 3.23 = 0.32

4 0
3 years ago
Other questions:
  • What is the value of b if 9+b=-8
    14·2 answers
  • Subtract 5 from 6, then add 3 to the result
    5·2 answers
  • 4/25+1/5 in simplest form
    12·1 answer
  • What must be different for a system to have one solution
    6·1 answer
  • On a certain hot summers, 256 people used the public swimming pool. The daily prices are $1.75 for children and $2.75 fo adults.
    12·1 answer
  • Look at the 500 1/10 of, what is it?
    14·1 answer
  • 4w+6x+15y+4w+6x-7y
    8·1 answer
  • Which expression will help you find the area of the triangular base?
    12·1 answer
  • How many of the following relations are functions ?
    13·1 answer
  • The base of a triangle is twelve more than twice its height. If the area of the triangle is 43 square centimeters, find its base
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!