The answer please answer

Answer:

Many accounts of the atom begin with a history of the growth in scientists' understanding of its structure, but here we will take the opposite approach, first discussing the atom in terms of what physicists and chemists today understand. Only then will we examine the many challenges scientists faced in developing the current atomic model: false starts, wrong theories, right roads not taken, incomplete models. In addition, we will explore the many insights added along the way as, piece by piece, the evidence concerning atomic behavior began to accumulate. People who are not scientifically trained tend to associate studies of the atom with physics, not chemistry. While it is true that physicists study atomic structure, and that much of what scientists know today about atoms comes from the work of physicists, atomic studies are even more integral to chemistry than to physics. At heart, chemistry is about the interaction of different atomic and molecular structures: their properties, their reactions, and the ways in which they bond.

Step-by-step explanation:

Sample Response: "Studying atoms is important because knowledge about atoms helps people to understand the world around them and produce materials used in daily life. Also, research done on atoms has contributed to the improvement of people's lives through medicine, to the protection of the environment, and to the discovery of new things about the world and the universe."

Answer:

[tex]( {2x}^{2} - 3)(4x + 3) \\ = 8 {x}^{3} + {6x}^{2} - 12x - 9 \\ [/tex]

Step-by-step explanation:

[tex]h(x).g(x) = (2 {x}^{2} - 3)(4x + 3) \\ \boxed{8 {x}^{3} + 6 {x}^{2} - 12x - 9 }✓[/tex]

Answer:

(1, 0)

Step-by-step explanation:

X intercept is when y=0

0 = 4x - 4

4 = 4x

1 = x

X intercept is at x = 1

Answer:

35 tickets at $35, 72 tickets at $25

Step-by-step explanation:

x+y=107 -> 5x+5y=535

45x+25y=3375

simplify, divide by 5 to get

9x+5y=675

Substract

 9x+5y=675

- 5x+5y=535

4x=140 -> x=35

y=107-35 = 72

Answer:

Given triangles are similar

[tex] \frac{9}{6} = \frac{x}{4} \\\frac{3}{2} = \frac{x}{4} \\ x = \frac{(3 \times 4)}{2} \\ \boxed{x = 6}[/tex]

Answer:

{-12,12}

Step-by-step explanation:

it looks like that I guess

Answer: 120x

Step-by-step explanation:

Answer:

1.625²

Step-by-step explanation!

1.625 x 1.625 is just 1.625 two times. So you add a 2 on the top which represents the number. You can write 1.625² instead of putting 1.625 x 1.625.  

1.625 x 1.625 can be written in exponential form as [tex]1.625^2[/tex]

Given :

The given expression is 1.625 x 1.625 . we need to write it in exponential form

The exponent is in the form of [tex]b^x[/tex], where 'b' is the base and 'x' is the exponent

base is the number and x is the exponent that is repeating number of times

For example , [tex]2 \cdot 2 \cdot 2 = 2^3[/tex]

where 2 is the base and 2 is occurring three times

so exponent is 3

1.625 x 1.625 can be written in exponential form as [tex]1.625^2[/tex]

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Answer:

The number of branches triples every 15 years.

Step-by-step explanation:

Satoshi started studying how the number of branches on his tree grows over time.

The relationship between the elapsed time t, in years, since Satoshi started studying the tree, and the number of its branches, N(t), is modeled by the following function:

N(t) = 24 - 3^t/15

Complete the following sentence about the growth rate of the branches. The number of branches triples every years.

The number of branches triples every 15 years.

Given is that the relationship between the elapsed time [t], in years, since Satoshi started studying the tree, and the number of its branches [N(t)], is modeled by the following function → N(t) = 24 - 3^t/15

The function that models the situation is -

N(t) = 24 - 3ⁿ/15    .... Eq[1]

After tripling the number of branches, we can write -

3N(t) = 24 - 3ⁿ/15

N(t) = {24 - 3ⁿ/15}/3     ..... Eq [2]

Equating both equations, we get -

{24 - 3ⁿ/15} = {24 - 3ⁿ/15}/3

3{24 - 3ⁿ/15} = {24 - 3ⁿ/15}

72 - 3ⁿ/5 = 24 - 3ⁿ/15

72 - 24 = 3ⁿ/5 - 3ⁿ/15

48 = 3ⁿ(1/5 - 1/15)

n = 15

Therefore, the number of branches triples every 15 years.

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Answer: See explanation

Step-by-step explanation:

Your question isn't well written but let me help out by making some assumptions.

Let's say Jamie's older brother and his three friends want to split the cost of lunch that costs $30 and they also want to leave a 20% tip. How much should each person pay?

Cost of the lunch = $30

Tip = 20% × $30 = 0.2 × $30 = $6

Total amount to be paid = $30 + $6 = $36

Since there are four people and they want to share the cost, each person would pay:

= $36 / 4

= $9

Answer:

one jumbo cost $4 and one chocolate cost $2

Step-by-step explanation:

Let the price eif one jumbo be x

Let the price of one chocolate be y

If one jumbo and 2 chocolate cost$6, then

x+2y= 6 ... 1

If one jumbo and 4chocolate cost $8, then;

x +4y = 8... 2

Subtract both equations

2y -4y = 6-8

-2y= -2

y = 1

Substitute y = 1 into 1;

From 1, x+2y = 6

x +2(1) = 6

x = 6-2

x = 4

Hence one jumbo cost $4 and one chocolate cost $2

Answer:

Step-by-step explanation:

Simply plug each x value into the equation

1.

-3, 0, 3, 6, 8, yes it is linear, it doesn't have any exponents

2.

Same thing

5,2,1,2,5, it has exponenets and is not linear

Answer:100 degrees

its 100

The product of the expressions is 12y⁵-3y³+27y²

Expressions in math are mathematical statements that have a minimum of two terms containing numbers or variables, or both, connected by an operator in between.

Given that, two expressions, -3y² and (-4y³+y-9) we need to find their products,

So,

= -3y² x (-4y³+y-9)

= -3y²(-4y³) -3y²(y) -3y²(-9)

= 12y⁵-3y³+27y²

Hence, the product of the expressions is 12y⁵-3y³+27y²

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Answer:

90% of confidence interval for the true population of club members who use compost

(0.44424 , 0.45576)

Step-by-step explanation:

Step(i):-

Given that the size of the sample 'n' =200

Given that the sample proportion

            p = 45% = 0.45

Level of significance = 90% or 10%

Critical value Z₀.₁₀ = 1.645

Step(ii):-

90% of confidence interval for the true population of club members who use compost

[tex](p^{-} - Z_{0.10} \sqrt{\frac{p(1-p^{-} )}{n} } , p^{-} + Z_{0.10} \sqrt{\frac{p(1-p^{-} )}{n} })[/tex]

[tex]((0.45 - 1.645\sqrt{\frac{0.45(1-0.45)}{200} } , 0.45 + 1.645\sqrt{\frac{0.45(1-0.45)}{200} })[/tex]

(0.45 - 0.00576 , 0.45 +0.00576)

(0.44424 , 0.45576)

Final answer:-

90% of confidence interval for the true population of club members who use compost

(0.44424 , 0.45576)

Answer:

Step-by-step explanation:

First you can find the area of the rectangle:

12 x 25 = 300

Then you can find the area of the triangle:

A = h x b / 2

A = 12 x 12 / 2

A = 72

Finally you add the rectangle and triangle together: 300 + 72 = 372

P=2.50x+100

The slope of the function is 2.50 which represents the commission Dylan makes for each computer sale. :)

Answer:

12a + 24 = 6(2a + 4)

Step-by-step explanation:

Given the numbers :

4, 12a 6 2a and 24 ; create an equivalent expression :

12a, 2a, 4, 6, 24

We could separate tbe constant terms and those with variables :

12a, 2a ; 6, 4, 24

We could put the larger digit to one side

12a + 24 = 6(2a + 4)

This way the Right hand side is equal to the left hand side.

Check:

12a + 24 = 6(2a + 4)

12a + 24 = 12a + 24

Hence, the proof

Answer:

I think the second choice?

Step-by-step explanation:

Answer:

$1000 for 10 years at 6% interest.

Step-by-step explanation:

First, converting R percent to r a decimal

r = R/100 = 6%/100 = 0.06 per year,

then, solving our equation

I = 100 × 0.06 × 50 = 300

I = $ 300.00

The simple interest accumulated

on a principal of $ 100.00

at a rate of 6% per year

for 50 years is $ 300.00.

First, converting R percent to r a decimal

r = R/100 = 6%/100 = 0.06 per year,

then, solving our equation

I = 1000 × 0.06 × 10 = 600

I = $ 600.00

The simple interest accumulated

on a principal of $ 1,000.00

at a rate of 6% per year

for 10 years is $ 600.00.

Answer:

1.5 cups of lemonade per 1 lemon

Step-by-step explanation:

find the unit rate:

4/4=1

6/4=1.5

1.5 cups of lemonade per 1 lemon

I hope I read this correctly

The unit rate is 0.2

Answer:

b) 83.2 c) 62.5

Answer:

$5,175

Step-by-step explanation:

First, converting R percent to r a decimal

r = R/100 = 5%/100 = 0.05 per year,

then, solving our equation

I = 4500 × 0.05 × 3 = 675

I = $ 675.00

The simple interest accumulated

on a principal of $ 4,500.00

at a rate of 5% per year

for 3 years is $ 675.00.

Answer and Step-by-step explanation:

Given the system of equations:

2x – 5y = 13

–3x + 2y = 13

We can decide to eliminate either x or y in order to solve the simultaneous equations.

1. To eliminate x:

Multiply the first equation by the coefficient of x in the second equation and multiply the second equation by the coefficient of x in the first equation. By doing this the coefficients of x in the equations would be the same and subtracting them to be equal to zero becomes easy, thus eliminating that variable.

The coefficient of x in the second equation is –3, if we multiply the first equation by it we have:

–6x+15y = –39

The coefficient of x in the first equation is 2, if we multiply the second equation by it we have:

–6x+4y = 26

Subtracting the resulting equations we have:

11y = –65 and x is eliminated.

2. To eliminate y:

Multiply the first equation by the coefficient of y in the second equation and multiply the second equation by the coefficient of y in the first equation. By doing this the coefficients of y in the equations would be the same and subtracting them to be equal to zero becomes easy, thus eliminating that variable.

The coefficient of y in the second equation is 2, if we multiply the first equation by it we have:

4x–10y = 26

The coefficient of y in the first equation is –5, if we multiply the second equation by it we have:

15x–10y = –65

Subtracting the resulting equations we have:

–11x = 91 and y is eliminated.

Answer:

fbk;lm vn;djkfbnjklnbjknjobjnjnbjnbgjnbgjnbgjn

Step-by-step explanation:

Answer:

(1.3)(2.5)(3.7)(4.9)(5.11)

(1.1)(2.5)(3.9)(4.13)(5.17)