A copper wire is submerged in a clear liquid in container A. After a while, the contents of the container changed to look like what is in container B, with a white crystal coating on the copper wire and the liquid turning light blue. Which are indicators that a chemical reaction has occurred? Check all that apply.

formation of a flame
formation of a precipitate
formation of a gas
change in odor
change in color

Answer:

58

Step-by-step explanation:

[tex]~\hspace{7em}\textit{negative exponents} \\\\ a^{-n} \implies \cfrac{1}{a^n} ~\hspace{4.5em} a^n\implies \cfrac{1}{a^{-n}} \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ x^6~~ = ~~9^{-3}\implies x^6~~ = ~~(3^2)^{-3}\implies x^6~~ = ~~3^{-6} \\\\\\ x^6~~ = ~~(3^{-1})^6\implies x=3^{-1}\implies x=\cfrac{1}{3^1}\implies x=\cfrac{1}{3}[/tex]

Answer:

Step-by-step explanation:

Here, it is given that the radius of sphere is 46.1 ft and we have to find the volume of the sphere .

So, we know that,

⇒ Volume(Sphere) = 4/3πr³

Now, Substituting the given values in the formula :

⇒ Volume(Sphere) = 4/3 × 3.14 × (46.1)³

⇒ Volume(Sphere) = 4/3 × 3.14 × 97972.18

⇒ Volume(Sphere) = 4/3 × 307632.64

⇒ Volume(Sphere) = 307,632.64 × 4/3

⇒ Volume(Sphere) = 1230530.59/3

⇒ Volume(Sphere) = 410176.86

Therefore,

The volume of a sphere with a radius of 46.1 feet is 410176.9 cubic foot.

The volume of sphere is the measure of space that can be occupied by a sphere.  If the radius of the sphere formed is r and the volume of the sphere is V. Then, the volume of the sphere is given by: Volume of Sphere, V = (4/3)πr³

Given that, the radius of a sphere = 46.1 feet.

Here, volume = 4/3 ×3.14×46.1³

= 410176.864

≈ 410176.9 cubic foot

Therefore, the volume of a sphere with a radius of 46.1 feet is 410176.9 cubic foot.

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Answer:

18.15 cm

Step-by-step explanation:

.33    is 33% in decimal

.33 * 55 cm = 18.15 cm

Answer:

-8,6

Step-by-step explanation:

all of the other answers are within the highlighted area of tha graph and thus are solutions but -8,6 is outside the highlighted area

Answer: 54 Coins are not nickel( 16+14+24)

n= 74 - non nickel

n= 74- (penny+ dime+ quarter)

n= 74- (16+14+24)

Step-by-step explanation:

Answer:

4/5

Step-by-step explanation:

All as percentages are:

0.6 = 60%

4/5 = 80% (largest)

0.75 = 75%

Therefore, Jake should select 4/5.

The statements which help Kyle’s spreadsheet become more organized are (ii and iii). They should be different having the time, of transaction to simplify find.

Spreadsheet is the electronic sheet in which the data can be arranged and saved for the future use. This data in a spreadsheet is arranged in the rows and the column of the spreadsheet.

Kyle uses a spreadsheet to keep track of his spending. this is an example of Kyle’s spreadsheet for two months.

Kyle thinks that he could improve this spreadsheet, but he is not sure how. Choose the statement or statements that would help kyle’s spreadsheet become more organized.

The statement, which may help him,

Thus, The statements which help Kyle’s spreadsheet become more organized are (ii and iii). They should be different having the time, of transaction to simplify find.

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Answer:

C

Step-by-step explanation:

trust

The statement which is true about the function is that the function is negative for all real values of x where x < –3 or x > –1.

A function assigns the value of each element of one set to the other specific element of another set.

The graph of the function is,

[tex]f(x) = -(x +3)(x - 1)[/tex]

It is positive, its value is above x-axis. For the function above, the solutions are,

[tex]x+3=0\\x=-3\\x-1=0\\x=1[/tex]

The value of x is lies between,

[tex]-3 < x < 1[/tex]

Thus, the statement which is true about the function is that the function is negative for all real values of x where x < –3 or x > –1.

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Answer:1

Step-by-step explanation:

Answer:

a₈ = 1

Step-by-step explanation:

substitute n = 8 into the nth term rule

a₈ = 25 - 3(8) = 25 - 24 = 1

Answer:

Our answer has to be B because we need to develop an equation to solve for the value of each term in order to find the number pattern.

Step-by-step explanation:

This is a sequence problem.

You need to identify the relationships between the given number pattern.

If we look at -14 and -8, you can clearly see that something is happening.

If we were to do -14+6 that would equal to -8

Then we try the other one like -8 and -2. We can do -8 + 6 = -2

So our sequence/number pattern is that we're increasing by 6.

We could also develop an equation: -14 + x= -8

Our answer has to be B because we need to develop an equation to solve for the value of each term in order to find the number pattern.

Answer:

28.8 inches tall

Step-by-step explanation:

47.2/5.9 = 8

8(3.6) = 28.8

Dividing the corresponding widths of the photos can help you find the scale factor. After finding the scale factor of 8 you can multiply the height to find the new scaled height of 28.8.

Answer:

36

Step-by-step explanation:

[tex]12p-20t=4(3p-5t)[/tex]

Substitute [tex]3p - 5t = 9[/tex] into the equation:

[tex]\implies 12p-20t=4(9)=36[/tex]

Answer:

29.02

Step-by-step explanation:

The area of traingle formula with two sides and one angle is:

[tex]A = ab\frac{siny}{2}[/tex]

When you put the values in, you can simplify it and put it into a calculator for sin. And, you then have your answer.

Answer:

Flipping a coin to determine which participants in a study are in the control group versus the treatment group is a form of: blinding.

Step-by-step explanation:

Answer:2

Step-by-step explanation:1+1*1 is 2 there for this is the answer to life

ACtualy that is 42

If Mr. Swift is traveling from his house to the history museum. The number of meters will he travel to the museum is 6,400 meters.

Given:

Distance=6.4 Kilometres

Hence:

1 kilometre= 1,000 meters

Number of meters=6.4 kilometres x 1,000 meters

Number of meters =6,400 meters

Therefore the number of meters will he travel to the museum is 6,400 meters.

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Answer:

43/50

Step-by-step explanation:

Answer:

x > 21/32

Step-by-step explanation:

I've used an app but for some reson it won't let me tell you.

The distance between Reeta and the school when the cyclists arrive the home for this case is found being 2 km

You can represent the unknown amounts by the use of variables. Follow whatever the description is and convert it one by one mathematically. For example if it is asked to increase some item by 4 , then you can add 4 in that item to increase it by 4. If something is for example, doubled, then you can multiply that thing by 2 and so on methods can be used to convert description to mathematical expressions.

If the object is going linearly, and at constant speed, then the speed of that object is given by the distance it traveled to the time it took to travel that distance.

If the object traveled D distance in T units time, then that object's speed is

[tex]Speed = S = \dfrac{\: Distance \: traveled}{\: Time \: taken} = \dfrac{D}{T} \: \rm unit \: length/unit \: time[/tex]

Given that:

To find: Disance of Reeta from school when cyclist reach home.

Suppose at time 0 hours, all three people departed from school (on that monday).

After 't' hours, suppose the cycle gets punctured.

Then, as the cycle was going by 20 km / hour speed, so in 't' hours, it must have covered d kilometers (suppose),

then we get:
[tex]S = \dfrac{D}{T}\\\\20 = \dfrac{d}{t}\\\\d = 20 t \: \rm km[/tex]

This distance is measured from school. But we know that this distance is 4 km, so we get:

[tex]20t = 4\\t = \dfrac{4}{20} = 0.2 \: \rm hours[/tex]

The remaining 1 km (as home is 5 km away from school and 4 km is already traveled) is walked by Cyclists. And walking speed is 5 km / hour, so let they take T hours to travel that 1 km walking, then we get:
[tex]S = D/T\\\\5 = \dfrac{1}{T} \\\\T = 0.2 \: \rm hours[/tex]

So, total time cyclists took to reach home from school is: [tex]0.2 + 0.2 = 0.4 \: \rm hours[/tex]

Reeta is walking that whole 5 km.

The time the cyclist reached home, Reeta had walked for 0.4 hours as they had started at the same time, and it took cyclists 0.4 hours to reach home.

Thus, we have:

Time taken  0.4 hours, speed of Reeta = walking speed= 5 km/hour, then we get:

[tex]S = D/T\\D = ST\\D = 5 \times 0.4 = 2 \: \rm km[/tex]

So Reeta was 2 km away from school when cyclists reached home on that monday.

Thus, the distance between Reeta and the school when the cyclists arrive the home for this case is found being 2 km

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The statement which is true of the base, b of a logarithmic function is; b > 0 and b = 1.

When the base of a logarithmic function is set to a negative number, it follows that;

Such a logarithmic function wouldn't give us any real solutions.

So the base CAN NOT be negative.

Putting together all 3 conclusions, we can say that the base of a logarithm can only be positive numbers greater than 1.

Hence, the statement which is true of the base, b of a logarithmic function is; b > 0 and b = 1.

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Answer:

b > 0 and b = 1.

Step-by-step explanation:

Answer:

Step-by-step explanation:

Diameter = 20 cm

Radius = r = 20 ÷ 2 = 10 cm

[tex]\boxed{\text{Area of circle =$\pi r^{2}$ }}[/tex]

                      = π *10 * 10

                     = 100π cm²

well, they put a downpayment of 40%, that's not subject for a loan, since they put that out of their pocket, the loan will  be the 60% leftover.

[tex]\begin{array}{|c|ll} \cline{1-1} \textit{a\% of b}\\ \cline{1-1} \\ \left( \cfrac{a}{100} \right)\cdot b \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{40\% of 280000}}{\left( \cfrac{40}{100} \right)280000}\implies 112000\leftarrow downpayment \\\\\\ 280000~~ - ~~112000\implies 168000\leftarrow \textit{mortgage loan}[/tex]

Answer:

The correct answer is x = 32/9

Step-by-step explanation:

You must multiply the given numbers from left to right, resulting in:

x - 4 + x/2 = x + 12 - 3x - x

Then, by combining phrases on both sides that are similar, we get:

(3/2)x - 4 = -3x + 12

By adding 4 to both sides of the equation, it becomes:

(3/2)x = -3x + 16, or

3/2)x + (6/2)x = 16, which may be written as:

3x + 6x = 32, or 9x = 32

Therefore, the answer is x = 32/9

I hope this helps! ^-^

Answer:

seventh grade- 10

ninth grade- 18

Hope This Helped! :)

Answer:

so let's see buddy....

Step-by-step explanation:

look at that angle having 45, zed (Z) angles are equal, which means the bottom left inside the triangle is also 45°.

now sum of angles in a triangle is 180°...

so we add up all the angles and equal them to 180° but an angle is missing, let's name it Y°.

so...

96°+45°+Y°=180°

101°+Y°=180°

Y°=180°–101°

Y°=79°

to find x, sum of angles in a straight line is 90°

so we subtract 79 from 90

x°= 11

Answer:

x = 20

B = 92°

C = 40°

Step-by-step explanation:

The sum of the interior angles of a triangle is 180°

⇒ A + B + C = 180°

⇒ 48 + (6x - 28) + 2x = 180

⇒ 48 + 6x - 28 + 2x = 180

⇒ 48 - 28 + 6x + 2x = 180

⇒ 20 + 8x = 180

⇒ 8x = 180 - 20

⇒ 8x = 160

⇒ x = 160 ÷ 8

⇒ x = 20

Now we have found x, simply substitute this into the expressions for angles B and C:

B = 6(20) - 28

   = 120 - 28

   = 92°

C = 2(20)

  = 40°

Answer:

x = 20

m<B = 92

m<C = 40

(m<A = 48)

Step-by-step explanation:

triangles are 180 degrees

add up the sides

48 + (6x-28) + 2x

8x + 20 = 180

8x = 160

x = 20

put 20 where the x is for B and C

B.

6(20)-28 =

120 - 28 =

92

C.

2(20) =

40

I think its B about 8.6 units

The best measure of the angle ∠XYZ is given by: Option B: 39.8°

Trigonometric ratios for a right angled triangle are from the perspective of a particular non-right angle.

In a right angled triangle, two such angles are there which are not right angled (not of 90 degrees).

The slant side is called hypotenuse.

From the considered angle, the side opposite to it is called perpendicular, and the remaining side will be called base.

From that angle (suppose its measure is θ),

[tex]\sin(\theta) = \dfrac{\text{Length of perpendicular}}{\text{Length of Hypotenuse}}\\\cos(\theta) = \dfrac{\text{Length of Base }}{\text{Length of Hypotenuse}}\\\\\tan(\theta) = \dfrac{\text{Length of perpendicular}}{\text{Length of base}}\\\\\cot(\theta) = \dfrac{\text{Length of base}}{\text{Length of perpendicular}}\\\\\sec(\theta) = \dfrac{\text{Length of Hypotenuse}}{\text{Length of base}}\\\\\csc(\theta) = \dfrac{\text{Length of Hypotenuse}}{\text{Length of perpendicular}}\\\\[/tex]

The missing figure is attached below.

From the given figure, if we see from the angle x which is ∠XYZ, the hypotenuse is YZ, perpendicular = XZ with length 10 inches, and base XY with length 12 inches.

Since perpendicular and base are specified, we can directly use tangent ratio and then its inverse to find the measure of the ∠XYZ, as shown below:

[tex]\tan(\angle XYZ) = \dfrac{|XZ|}{|XY|} = \dfrac{10}{12}\\\\\angle XYZ = \tan^{-1}\left(\dfrac{10}{12}\right) \approx 39.8^\circ[/tex]

Thus, the best measure of the angle ∠XYZ is given by: Option B: 39.8°

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Answer:

b

Step-by-step explanation:

took the test