Can You help me please

Answer:

0.427

Step-by-step explanation:

Standard error for the sampling distribution refers to the standard deviation of the samples taken from a population. The standard error equals the standard deviation divided by the square root of the sample size

The probability of customers who drink tea (p) = 24% = 0.24, the sample size of customers (n) = 300.

Standard error = \(\frac{\sigma}{\sqrt{n} }\) where σ is the standard deviation.

\(\sigma=\sqrt{np(1-p)}\)

Standard error = \(\frac{\sigma}{\sqrt{n} }= \frac{\sqrt{np(1-p)} }{\sqrt{n} } =\sqrt{\frac{np(1-p)}{n} } =\sqrt{p(1-p)}=\sqrt{0.24(1-0.24)} =0.427\)

Answer:

\((x - \frac{ - 9 + \sqrt{161} }{2} )(x - \frac{ - 9 - \sqrt{161} }{2} ) \)

Step-by-step explanation:

\(1. \: a(x - \frac{ - b + \sqrt{ {b}^{2} - 4ac} }{2a} ) \: (x - \frac{ - b - \sqrt{ {b}^{2} - 4ac} }{2a}) \\ 2. \: (x - \frac{ - 9 + \sqrt{ {9}^{2} - 4 \times - 20 } }{2} ) \: (x - \frac{ - 9 - \sqrt{ {9}^{2} - 4 \times - 20 } }{2} )\)

Solve for  x  by simplifying both sides of the equation, then isolating the variable.

Exact Form: x= 2/5

Decimal Form: x= 0.4

By evaluating an exponential function we can see that after 90 days there willbe 340 rabbits.

We know that the rabbit population can increase by 45% every 10 days, then the population can be modeled by the exponential function:

P(x) = A*(1 + 0.45)^(x/10)

Where x is the time in days and A is the initial population.

Here we know that the initial populationis 12 rabbits, then the function is:

P(x) = 12*(1.45)^(x/10)

And the population after 90 days is:

P(90) = 12*(1.45)^(90/10)

P(90) = 340

There will be 340 rabits in 90 days.

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For the lines to be parallel the two angles need to be equal to each other:

128-x = x

Add 1x to both sides

128 = 2x

Divide both sides by 2:

X = 128/2

X = 64

Answer: x = 64

Answer:

4

Step-by-step explanation:

2 16 12 48

2 8 6 24

4 3 12

2×2= 4

Answer:

Tell me you address right now!!!

Step-by-step explanation:

I am gonna call police for help!

Answer:

75

Step-by-step explanation:

i used a calculator, sorry

Answer:

29/180 is the answer for 58/360 in simplest form

Answer:

y=-2x+b

Step-by-step explanation:

The slope ("m") is 2... rise over run, the line goes up two, and then to the side once, which is 2/1 (aka 2). Since the line is going downhill, it is negative.

Answer:

y = 2.5x

Step-by-step explanation:

use y = mx + c

m = gradient (rise/run)

c = y intercept at x = 0

m = 10 / 4 = 2.5

c = 0

y = 2.5x

becuase c = 0 you dont add it into the equation

Answer:

y=mx + c.

the y intercept is represented by c, this is where our line meets the y axis. here our y intercept is 0, because the line meets the y axis at the point 0 on the y axis. therefore, we discard this from the equation as it has no meaning/relevance. the gradient is equal to the rise over run. so, the line had risen by ten, and ran across by 5. 10÷5=2. so, the equation of the line is just y=2x hope this helps.!!!

Answer:

0.8

Step-by-step explanation:

If you look at the wheel it has a total of 5 sections and 4 of the sections are beaver.

Therefore, 4/5 = 80% or 0.8

Answer:

it was 1/3

Step-by-step explanation:

i know because i got it right on khan academy adn sorry if im am late

Given:

Greeting card cost before tax = $4

Discount = 15%

Sales tax = 5%

To find:

How much will the customer pay for the card?

Solution:

It is given that the cost of the greeting card before tax is $4.

After 15% discount, the cost of the greeting card is:

Cost of card after discount \(=4-\dfrac{15}{100}\times {4}\)

                                             \(=4-0.6\)

                                             \(=3.4\)

The cost of card after 5% sales tax is:

Cost of card after tax \(=3.4+\dfrac{5}{100}\times 3.4\)

                                    \(=3.4+0.17\)

                                    \(=3.57\)

Therefore, the customer will pay $3.57 for the greeting card.

To complete the sentence, 5.1 liters is approximately equal to 5.4 quarts.

5.1 liters is approximately equal to 5.39 quarts.

To convert liters to quarts, we need to consider the conversion factor that 1 liter is approximately equal to 1.05668821 quarts. By multiplying 5.1 liters by the conversion factor, we get:

5.1 liters * 1.05668821 quarts/liter = 5.391298221 quarts.

Rounded to the nearest hundredth, 5.1 liters is approximately equal to 5.39 quarts.

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Given the word problem, we can deduce the following information:

1. The total amount is $12.07.

To determine the bills and coins equal to $12.07, we must follow the steps below:

Total = $12.07

So,

We subtract $10 bill since it is the largest bill not larger than the total ($12.07):

$12.07-$10.00= $2.07

We subtract $1.00 since it is the largest bill not larger than the total ($2.07):

$2.07-$1.00= $1.07

We subtract $1.00 since it is the largest bill not larger than the total ($1.07):

$1.07 -$1.00=$0.07

We subtract $0.05(Nickle) since it is the largest bill not larger than the total ($0.07):

$0.07-$0.05= $0.02

We subtract $0.01 (Dime) since it is the largest bill not larger than the total ($0.02):

$0.02-$0.01=$0.01

We subtract $0.01 (Dime) since it is the largest bill not larger than the total ($0.01):

$0.01-$0.01 =0

Therefore, the bills and coins are:

$10 bill =1

$1.00 bill =2

$0.05(Nickle) =1

$0.01 (Dime)=2

Answer:

2

Step-by-step explanation:

1/4(-4×3 + 10×2)

1/4(-12 + 20)

THERE ARE 2 WAYS YOU COULD SOLVE THIS!

1. 1/4( -12) + 1/4( 20) = -3 + 5 = 2

2. 1/4 ( -12+20) = 1/4(8) = 2

Answer:

\(9\)

Step-by-step explanation:

Given:-

Expression:  \(\frac{1}{4} (c^3+d^2)\)

Value of c = \(-4\)

Value of d = \(-10\)

Solution:-

Add the given values in the expression, writing them inside the bracket:

\(\frac{1}{4} ((-4)^3+(-10)^2)\)

\((\frac{1}{4}) ((-4)^3)+(\frac{1}{4} )((-10)^2)\)

\(-16+25\)

\(9\)

There are several ways to determine that an angle is a right angle, which means it measures exactly 90 degrees. Here are three different methods to identify a right angle:

Using a protractor: One of the most common and accurate ways to determine if an angle is a right angle is by using a protractor. Place the protractor on the angle in question, aligning the base of the protractor with one side of the angle. Then, check the scale on the protractor and verify that the angle measures exactly 90 degrees.

Using a carpenter's square or a set square: A carpenter's square or a set square is a right-angled tool with two arms at a 90-degree angle. To determine if an angle is right, place one arm of the square along one side of the angle and the other arm along the other side. If the third side of the angle aligns perfectly with the square's edge, it confirms that the angle is a right angle.

Observing perpendicular lines: Another way to identify a right angle is by examining the relationship between lines. In a Euclidean plane, if two lines intersect and the adjacent angles formed are equal and measure 90 degrees each, it indicates the presence of a right angle. This method is particularly useful when dealing with geometric shapes or structures where perpendicular lines are evident, such as squares or rectangles. These methods provide different approaches to determine whether an angle is a right angle, allowing for flexibility and confirmation through various measurement tools or geometric relationships.

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The voltage across the capacitor at t=0+ is 4 volts (c \(V_c(t=0+)\) )is 4V). As time approaches infinity, the voltage across the capacitor becomes 6 volts ( \(V_c( t \to\infty)\) )is 6V). The current through the capacitor at t=0+ is -2 milliamperes ( \(i_c(t=0+)\) )is -2mA).

At t=0+, the switch opens and the circuit transitions into a new steady state. Initially, the capacitor is fully charged to 4V, so \(V_c(t=0+)\)is 4V. In the new steady state, the capacitor is connected to a series combination of R1, R2, R3, and R4. Since R1 and R2 are in series, their total resistance is 3kΩ. Thus, the time constant of the circuit is given by τ = (R1+R2+R3+R4)C = 6kΩ * 1μF = 6ms.

To determine\(V_c( t \to\infty)\) , we consider the steady state behavior of the circuit. In steady state, the capacitor acts as an open circuit. Therefore, the current flowing through R4 is zero, and the voltage drop across R4 is also zero. Thus, \(V_c( t \to\infty)\) is equal to the voltage drop across R3, which is 6V.

At t=0+, the current through R1, R2, and R3 will be the same as the current through the capacitor, ( \(i_c(t=0+)\) ). Applying Kirchhoff's current law at the node connecting R1, R2, R3, and the capacitor, we find that ( \(i_c(t=0+)\) )= I - (Vc(t=0+)/R1+R2+R3) = 4mA - (4V/3kΩ) = -2mA.

In summary, \(V_c(t=0+)\) is 4V, \(V_c( t \to\infty)\) is 6V, and \(i_c(t=0+)\)is -2mA.

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Answer::

:i

Step-by-step explanation:

.

Answer:

A

Step-by-step explanation:

7d/7=d

-56/7=-8

7(d-8)

Answer:

-50 + -50 = -100

Step-by-step explanation:

try that

Answer:

\( = \sqrt{100} \times \sqrt{ - 1} = 10i = 0 + 10i\)

Answer:

x=4 and  y=1

Step-by-step explanation:

4x-y=15

2x+y=9

6x=24

x=24/6

x=4

4x-y=15

4(4)-y=15

16-y=15

-y=15-16

-y=-1 Divide both sides by -1

y=1

Answer:

x = 4 and y = 1

Step-by-step explanation:

4x - y = 15

2x + y = 9

Isolate x --

4x - y = 15 (add y to both sides)

4x = 15 + y (divide both sides by 4)

\(\frac{4x}{4} =\frac{15}{4} +\frac{y}{4}\) (Simplify)

x = \(\frac{15 + y}{4}\)

Substitute x = 15 + y/ 4 in the other equation

2 * 15 + y/ 4 + y = 9 (simplify)

15 + 3y/ 2 = 9 (simplify)

y = 1 and x = 4

HOPE THIS HELPS YA!!

Answer:

X = 6y-2 is the easier substitution for another equation because all you have to do is just plug in the equation into the value of x.

Answer:

A

Step-by-step explanation:

The area of a rectangle is the product of its dimensions, that is

A = (2x - 5)(3x + 3) ← expand using FOIL

  = 6x² + 6x - 15x - 15 ← collect like terms

  = 6x² - 9x - 15 → A

The stage of group development that is characterized by disagreements and conflicts is called storming. During this stage, group members may have different ideas and opinions about how to approach tasks and goals, and they may struggle to find a common understanding.

Conflict can arise as individuals compete for leadership roles or try to assert their ideas over others. However, this stage is important for groups to progress towards their goals as it allows for open communication and the airing of different perspectives. Eventually, through negotiation and compromise, groups move on to the norming stage where a common understanding is established and roles are defined. From there, groups move on to performing, where they are able to work together effectively towards their goals.

Finally, the adjourning stage is where the group disbands after reaching their goals or completing their tasks.

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Answer:

If an atom has the same number of protons and electrons then it is electrically neutral. Not all atoms have to have the same number of atoms because the number of electrons can be changed with the element remaining the same. Protons have a positive charge while electrons have a negative charge. The net charge is dependent on the number of protons and electrons. If it has more protons it would have a higher amount of positive charge therefore making it a positive net charge. The same thing applies with electrons just opposite.

If the atom has no charge (neutral) then there are the same number of protons and electrons. The positive protons cancel out with the negative electrons to produce this neutral state. We can say the net charge is 0 here.

Now if you take away one or more electrons, then there will be more positive protons to outnumber the negative electrons. Overall, the net charge will be positive. For example, if the atom loses 3 electrons, then you'll have a net charge of \(3^{+}\). These positively charged ions are known as cations. You pronounce this as "cat-ion" instead of "catshun".

On the flip side, if you add electrons to an atom, then you'll make the net charge overall to be negative. So let's say we add 4 electrons. We'll have the net charge be \(4^{-}\) and this is an anion. To pronounce "anion" you would say "an ion" instead of "anyun".

---------------

In short, the number of protons and electrons are the same if the net charge is 0 and we're not dealing with ions. If you are dealing with ions, then the two counts will not be the same. Note how in the examples above, I didn't change the number of protons. Doing so would change the overall element entirely.

The expression for w can be written as the product of matrix A and vector V w = a1 * x + a2 * y.

To answer your question, let's first assume that we have found the expression for w in the previous step as w = a1 * x + a2 * y. Now, we will rewrite this expression as the product of a matrix A and a vector V.

Matrix A will consist of the coefficients a1 and a2, while vector V will contain the variables x and y:

Matrix A: | a1  a2 |
Vector V: | x |
         | y |

To write the expression w as the product of matrix A and vector V, we will perform matrix multiplication:

w = A * V
w = | a1  a2 | * | x |
                 | y |

To multiply a 1x2 matrix by a 2x1 vector, we perform the following steps:

1. Multiply the first element of the matrix's row (a1) by the first element of the vector's column (x): a1 * x
2. Multiply the second element of the matrix's row (a2) by the second element of the vector's column (y): a2 * y
3. Add the results from steps 1 and 2: a1 * x + a2 * y

Thus, the expression for w can be written as the product of matrix A and vector V:

w = a1 * x + a2 * y

This representation allows us to efficiently work with the expression for w in linear algebra and perform calculations involving other matrices and vectors.

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