Trish is shopping for a new vacuum online. The reviews for the vacuum she wants show that 104 people gave the product 5-stars. If this number represents 65% of the reviews left for the product, how many total reviews were left for the product?

(I am BEGGING you... PLEASE. NO. FILES!!!!!)

To solve this problem, we need to find the z-score corresponding to the 14th percentile of the normal distribution. We can then use this z-score to find the corresponding value of K.

First, we find the z-score corresponding to the 14th percentile using a standard normal distribution table or calculator. The 14th percentile is equivalent to a cumulative probability of 0.14, which corresponds to a z-score of approximately -1.08.

Next, we use the formula z = (x - μ) / σ to find the corresponding value of K. Rearranging this formula, we get x = μ + z * σ. Plugging in the values we know, we get:

K = 11 + (-1.08) * 0.25
K = 10.73 cm

Therefore, there is a 14% chance that a randomly selected cylindrical metal bar has a length longer than 10.73 cm.

Learn more about normal distribution: https://brainly.com/question/4079902

#SPJ11

a) Probability of drawing a Blue, then a Red:

There are a total of 11 marbles in the bag. The probability of drawing a Blue on the first draw is 3/11. After drawing a Blue, there are 10 marbles left in the bag, including 5 Red marbles. The probability of drawing a Red on the second draw is 5/10. Therefore, the probability of drawing a Blue, then a Red is (3/11) * (5/10) = 15/110 = 3/22.

b) Probability of drawing a Red, then a White:

The probability of drawing a Red on the first draw is 5/11. After drawing a Red, there are 10 marbles left in the bag, including 3 White marbles. The probability of drawing a White on the second draw is 3/10. Therefore, the probability of drawing a Red, then a White is (5/11) * (3/10) = 15/110 = 3/22.

c) Probability of drawing three Blues in a row:

The probability of drawing a Blue on the first draw is 3/11. After drawing a Blue, there are 10 marbles left in the bag, including 2 Blue marbles. The probability of drawing a Blue on the second draw is 2/10. After drawing two Blues, there are 9 marbles left in the bag, including 1 Blue marble. The probability of drawing a Blue on the third draw is 1/9. Therefore, the probability of drawing a Blue, then a Blue, then a Blue is (3/11) * (2/10) * (1/9) = 6/990 = 1/165.

Learn more about Probability here:

https://brainly.com/question/31828911

#SPJ11

Answer:

Step-b 4.55 g/cmy-step explanation:

Answer:

Probably Stimulus discrimination.

Step-by-step explanation:

Answer:

The name of the solid with 20 faces that are congruent equilateral triangles is icosahedron.

The solid you are referring to is called an icosahedron. An icosahedron is a specific type of convex polyhedron that has 20 faces. In this case, all 20 faces are congruent equilateral triangles. Option d is correct answer.

To understand why this solid is called an icosahedron, let's break down the term. "Icosa-" comes from the Greek word for twenty, while "-hedron" means face. Therefore, an icosahedron is a polyhedron with twenty faces.

Each face of an icosahedron is an equilateral triangle, meaning that all three sides of the triangle are equal in length, and all three angles are equal to 60 degrees. Since all 20 faces are congruent, they have the same side lengths and angles.

The icosahedron has a total of 12 vertices and 30 edges. The vertices are the points where three edges meet, and the edges are the line segments connecting the vertices. The icosahedron has a symmetrical and regular structure, making it one of the five Platonic solids.

An icosahedron is a convex polyhedron with 20 congruent equilateral triangle faces, 12 vertices, and 30 edges.

Option d is correct answer.

For more question icosahedron

https://brainly.com/question/10357380

#SPJ8

Answer:

-225

Step-by-step explanation:

Simple and best practice solution for 9x-25=0 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

Answer:

I have made it in above picture

Answer:

2 A.)

1) 3-4x+8x^2-6+2x-5x^2

2) 8x^2-5x^2-4x+2x+3-6

3) 3x^2-2x-3

B.) 3x-5-7x^2+2+6x^2+5x

Step-by-step explanation:

please mark brainiest

please give 5 stars

thank you

Answer:

x=55  (i think)

Step-by-step explanation:

190=(2x-10)+90

(subtract 90 from 190)

100=(2x-10)

(add 10 to 100)

110=2x

(divide by 2)

55=x

the Jacobian matrix J for the system is: J = [ 1/2 0 ] [ -1/13 2/13 ]

To solve the system of equations:

u = 2x - 3y,

v = x + 5y,

We can use the method of substitution.

1. Solve the first equation for x in terms of u and y:

  u = 2x - 3y

  Rearrange the equation:

  2x = u + 3y

  Divide both sides by 2:

  x = (u + 3y) / 2

2. Substitute the expression for x in the second equation:

  v = x + 5y

  Replace x with (u + 3y) / 2:

  v = (u + 3y) / 2 + 5y

  Simplify:

  v = (u + 3y + 10y) / 2

  v = (u + 13y) / 2

Now we have x = (u + 3y) / 2 and y = (2v - u) / 13.

To find the Jacobian, we need to compute the partial derivatives of x and y with respect to u and v.

Partial derivative of x with respect to u:

∂x/∂u = 1/2

Partial derivative of x with respect to v:

∂x/∂v = 0

Partial derivative of y with respect to u:

∂y/∂u = -1/13

Partial derivative of y with respect to v:

∂y/∂v = 2/13

The Jacobian matrix J is given by:

J = [ ∂x/∂u   ∂x/∂v ]

   [ ∂y/∂u   ∂y/∂v ]

Substituting the partial derivatives:

J = [ 1/2   0 ]

   [ -1/13   2/13 ]

Therefore, the Jacobian matrix J for the system is:

J = [ 1/2   0 ]

   [ -1/13   2/13 ]

To know more about Equation related question visit:

https://brainly.com/question/29657983

#SPJ11

Answer:

y= -5/4x+

Step-by-step explanation:

find the gradient first ∆y/∆5x

-4-1/ 8-4

=-5/4

assume one of the points to be x, y

y-1/ x-4 =-5/4

cross multiply

4y-4=-5x+20

4y= -5x+20+4

divide both sides by 4

y= -5/4x+

the height of the mast is approximately 51.5 meters.

what is approximately ?

"Approximately" means that the value is an estimate that is very close to the true value but may not be exact. In the context of the answer I provided, "approximately" indicates that the height of the mast is very close to 51.5 meters but may be slightly more or less than that value.

In the given question,

Let's call the height of the mast "h". We can use trigonometry to find the value of "h".

If we draw a diagram, we can see that the angle of elevation of the mast is the same as the angle between the ground and a line from P to the top of the mast. We can call this angle "θ".

We know that tan(θ) = opposite/adjacent = h/150.

We also know that tan(19°) = 0.3431 (rounded to 4 decimal places).

So we can set up an equation:

0.3431 = h/150

To solve for "h", we can multiply both sides by 150:

h = 0.3431 x 150

h = 51.465 (rounded to 3 significant figures)

Therefore, the height of the mast is approximately 51.5 meters.

To know more about height, visit:

https://brainly.com/question/10726356

#SPJ1

The margin of error for a 95% confidence interval is  0.263.

A probability distribution which is symmetric about the mean is the normal distribution, sometimes referred to as the Gaussian distribution. It demonstrates that data that are close to the mean occur more frequently than data that are far from the mean.

The formula for margin of error is ;

ME = (z × σ) / √ n

The confidence interval is 95% = 0.95.

Mean (σ) =14

standard deviation = 3.

Total population (n) = 500

Substitute the values in the formula;

ME = (z × σ) / √ n

      = (1.96 × 3)/√500

      = (1.96 × 3)/22.36

ME  = 0.263

Therefore, the margin of error for a 95% confidence interval is 0.263.

To know more about the normal distribution, here

https://brainly.com/question/23418254

#SPJ4

The complete question is -

A study of five hundred adults found that the number of hours they spend on social networking sites each week is normally distributed with a mean of 14 hours. The population standard deviation is 3 hours. What is the margin of error for a 95% confidence interval?

Answer:

B and C

Step-by-step explanation:

they have -5x,   it doesn't really matter on their order

15 friends pay £6 each for hall practice with inverse proportion

Friends  = 5

Each pays = £18

Total payments = 5*18

                          = 90

Friends = 15

Each pays = 90/15

                 = 6

Hence, 15 friends pay £6 each for hall practice with inverse proportion.

To learn more about inverse proportion here:

https://brainly.com/question/28054205

#SPJ4

Answer:

pleaase halp me

Step-by-step explanation:

Answer:

x = 40°

Step-by-step explanation:

110° and the base angle of the isosceles triangle are adjacent and supplementary, thus

base angle = 180° - 110° = 70°

The 2 bases are congruent and have measure of 70°, thus

x = 180° - 70° - 70° = 180° - 140° = 40°

Answer:

Step-by-step explanation:

Zero exponent numbers = 1

When you try to multiply an exponent by zero, it equals one.

Negative exponents is just a 1/x

Negative just flips over the equation.

For example, 9^-1

1/9^1

1/9

Answer:

Step-by-step explanation:

Zero Exponent Property: The zero exponent rule states that when a nonzero number is raised to the power of zero, it equals 1.

Example:  x^0 = 1

Negative Exponent Properties: the negative exponent rule tells us that a number with a negative exponent should be put to the denominator, and vice verse. It also describes how many times we have to multiply the reciprocal of the base.

An example of negative exponents is \(3^{-2}\).

Answer:

x

=

13

+

6

=

19

Step-by-step explanation:

this is so simple

Step-by-step explanation:

x=19 ayan na yung sagot huh

The divisions results to 0.88 and 0.22.

One of the fundamental mathematical operations is division, which involves breaking a bigger number into smaller groups with the same number of components.

How many groups will be created, for instance, if 30 students need to be separated into groups of five for a sporting event? The division operation can be used to quickly and easily fix such issues. In this case, we must divide 30 by 5.

Given:

8 and 2 divided by 9

When 8 is divided by 9

=8/9

= 0.88

and, when 2 is divided by 9

= 2/9

= 0.22

Learn more about division here:

https://brainly.com/question/21416852

#SPJ2

Answer:

1

Step-by-step explanation:

Y=2x+3

Y=2×(-1)+3

Y=1

The combination of scores that won the National Championship for Baylor are 18 free throws, 24 two point field goals and 6 three-point field goals.

An equation is a mathematical statement containing two expressions on either sides which are connected with an equal to sign.

Either sides of an equation is called as left hand side and right hand side.

Given Baylor University defeated Michigan State University by a score of 84 to 62.

Score of Baylor University = 84

Baylor won by scoring a combination of two-point field goals, three-point field goals, and one-point free throws.

Let the number of free throws = x

The number of two-point field goals was six more than the number of free throws.

Number of two point field goals = x + 6

Also, the number of two-point field goals was four times the number of three-point field goals.

Number of two point field goals =  4 (number of three-point field goals)

So, 4 (number of three-point field goals) = x + 6

Number of three-point field goals = (x + 6) / 4

Score for free throw = 1 point × x

Score for 2 point field goal = 2 points × (x + 6)

Score for 3 point field goal = 3 points × [(x + 6)/4]

[1 × x] + [2 (x+6)] + [3 ((x+6)/4] = 84

x + 2x + 12 + 3/4 x + 18/4 = 84

3.75x + 16.5 = 84

3.75x = 67.5

x = 18

Number of free throws = x = 18

Number of two point field goals = x + 6 = 18 + 6 = 24

Number of three-point field goals = (x + 6) / 4 = 24/4 = 6

Hence the combination are 18 free throws, 24 two point field goals and 6 three-point field goals.

Learn more about Equations solving here :

https://brainly.com/question/29783048

#SPJ1

Answer:

2167.7 sq yds

Step-by-step explanation:

SA(cone) = πr² + πrs     ('s' = slant height)

= π(15)² + π(15)(31)

= 225π + 465π

= 690π

= 2167.7

Answer:

B

Step-by-step explanation:

1 : 2 = 1/2 : 2 = 1/4 : 2 = 1/8 : 2 = 1/16 : 2 = 1/32 : 2= 1/64

Answer:

93%.

Step-by-step explanation:

% Decrease = Decrease ÷ Original Number × 100

Divde 11,625 by 12,500 and multiply the answer by 100.

11,625 ÷ 12,500 × 100 = 93  

The percentage reduction is 93%.

Answer:

A.

Step-by-step explanation:

Answer:

I believe A

Step-by-step explanation:

Answer: Rs. 1,52,550

Step-by-step explanation:

CP of motorcycle = 125000

Selling Price fixed = 125000 + 20% = 150000

10% discount = 150000*10% = 15000

SP after 10% discount

= 150000-15000= 135000

VAT at 13% = 135000 * .13 = 17550

Mr Gurung paid total

135000 + 17550 = 152550

Answer:

₹152550

Step-by-step explanation:

CP= ₹125000

MP= ₹125000+20%=₹125000*1.2= ₹150000

Discounted price= ₹150000-10%= ₹150000*0.9=₹135000

Paid with 13%VAT added= ₹135000*1.13= ₹152550

Hey there!

40 / 1 + 3 ‐ (3 * 7) + 7 - 5

= 40 + 3 - (3 * 7) + 7 - 5

= 43 + 7 - 5 - 3 * 7

= 50 - 5 - 3 * 7

= 45 - 3 * 7

= 45 - 21

= 24

Answer: 24

Good luck on your assignment and enjoy your day!

~Amphitrite1040:)

Answer:

8, 40°, 50°

Step-by-step explanation:

∠PAT is a right angle triangle so it sums up to 90°

5x + 7x - 6 = 90

12x - 6 = 90

12x = 90 +6

12x = 96

x = 96 ÷ 12

x = 8

Substitute...

∠PAC = 5x

5 × 8 = 40

∴∠PAC is 40°

∠TAC = 7x - 6

7 × 8 - 6 = 50

∴∠TAC is 50°