pls answer 6 and 7 with working out
thank you :)

The diameter of the DVD in centimeters found by adding together the ridges and valleys across the diameter is about 11.998 centimeters.

The diameter of a circle is the measured distance between the outer rim of the circumference of the circle, passing through the center of the circle.

The number and dimensions of the ridges (bumps) and valleys (without bumps) on the DVD disc are as follows;

The number of bumps across the diameter = 73,000

The thickness of a bump = 0.00032 cm

The number of valleys across the diameter = 73,000

The thickness of valley = 0.000074 cm

The diameter of the circle left blank at the middle of the DVD disc = 4.26 cm

The diameter of the DVD, D, is therefore obtained by multiplying thickness of the bumps and valleys then adding the result to the diameter of the circle in the middle as follows;

D = 73,000 × 0.000032 cm + 73,000 × 0.000074 cm + 4.26 cm = 11.998 cm

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Answer:

Step-by-step explanation:

Total Number of balls = 3+5+2=10

a)Probability both are red:  3/10 * 2/9 = 1/15

b)First ball blue, other green : 5/10 * 2/9 = 1/9

c) Both are different color : (3/10*7/9)+(5/10*5/9)+(2/10*8/9)

=21/90+25/90+16/90=62/90=31/45

d)Both are same color: (3/10*2/9)+(5/10*4/9)+(2/10*1/9)

=6/90+20/90+2/90 = 28/90 = 14/45

The measure of the missing angles are a = 65°, b = 115°, c = 115°, d = 65° and e = 65°

Angle geometry is a branch of mathematics that deals with angles and the properties of angles in geometric shapes such as measuring angles, classifying angles, and solving problems involving angles.

The measure of the missing angles are as follow:

a = 65° (corresponding angles are equal)

a + b = 180° (sum of angles of straight line is 180°)

65° + b = 180°

b = 180-65 = 115°

c = b  (corresponding angles are equal)

c = 115°

d = 180 - c (sum of angles of straight line is 180°)

d = 180 - 115 = 65°

e = d (corresponding angles are equal)

e = 65°

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The linear regression equation is given as follows:

y = -30x + 1048.8.

The estimate for the number of cases in 2026 is given as follows:

689 new cases.

The equation for the line of fit is obtained inserting the points of the data-set into a linear regression calculator.

(this is because there are multiple types of regression, such as logistic, exponential and quadratic regression).

The points for this problem are given as follows:

(0, 1047), (1, 1020), (2, 989), (3,943), (4,964), (5,880).

Inserting these points into a calculator, the regression equation is given as follows:

y = -30x + 1048.8.

2026 is 12 years after 2014, hence the estimate is calculated as follows:

y = -30(12) + 1048.8

y = 689 new cases.

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Answer: 26.7

Step-by-step explanation:

[tex]\frac{9.2}{v}=\tan 19^{\circ}\\\\\frac{v}{9.2}=\frac{1}{\tan 19^{\circ}}\\\\v=\frac{9.2}{\tan 19^{\circ}}\\\\v \approx 26.7[/tex]

Answer: The given equation is 9.2/v = tan(19). To solve for v, we can first multiply both sides of the equation by v to get rid of the denominator on the left side. This gives us 9.2 = v * tan(19).

Next, we can divide 9.2 by tan(19) to find the value of v. The value of tan(19) is approximately 0.3420201, so 9.2 / 0.3420201 = 26.884956 (rounded to 1 decimal place).

So the value of v in the equation is approximately 26.9 (to 1 decimal place).

Step-by-step explanation:

Therefore , the solution of the given problem of surface area comes out to be Concave hexagonal area equals 24.

Its surface area serves as a proxy for how much overall space it occupies. The whole environment of a three-dimensional shape is taken into account when calculating its surface area. The overall size of something is its surface area. The volume of water in a cuboid can be determined by summing the faces on all of its six rectangular sides. To determine the box's measurements, apply the following formula: For 2lh, 2lw, but also 2hw, the surface is the identical (SA). The region is represented by the surface area of the muti form.

Here,

Given :

The Pythagorean theorem can be used to calculate the distance between it circle centers and the difference in the radii of two circles (4-2=2) to determine the lengths of the rectangle's sides. 

We can calculate the area of rectangular as well as the two triangles using that. The regions of the these three forms are added to create the hexagon's surface area.

Let d be the distance between both the circle centers in the scenario described.

d² = (4+2)^2

d = √((4+2)^2) = √(36) = 6

Rectangle area = 26 divided by 12

Each triangle's area is equal to (1/2)(2d)/(1/2)(2*6), or 6

Hexagonal area equals 12 + 2 * 6 = 24.

Concave hexagonal area equals 24.

Therefore , the solution of the given problem of surface area comes out to be Concave hexagonal area equals 24.

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P2, P3, P1 is a safe sequence according to the banker's algorithm.

The banker's algorithm gets its name from the fact that it determines whether or not a person should be granted a loan amount in order to assist the bank system in securely simulating resource allocation. In this part, we'll go through the Banker's Algorithm in depth. The Banker's Algorithm is primarily used in the banking system to avoid stalemate. It assists you in determining whether or not a loan will be granted. This procedure is used to assess the allocation for securely replicating the maximum amount available for all resources.

Here,

According to the banker's algorithm, the sequence P2, P3, P1 is secure.

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The expression [tex](4^{(2/5)})^{(1/4)}[/tex] can be rewritten as the radical expression [tex]4^{(1/1280)}.[/tex]

What is the rational exponent?

A rational exponent is an exponent that is a fraction. In mathematics, a number raised to a fractional power represents a root of the number. For example, the expression[tex]x^{(1/3)}[/tex] represents the cube root of x. Similarly, the expression [tex]x^{(2/5)}[/tex] represents the fifth root of x².

The given expression can be rewritten as a radical expression as follows:

[tex](4^{(2/5)})^{(1/4)} = 4^{(2/5) * (1/4)}[/tex]

Using the property of exponents that (a^b)^c = a^(b*c), we simplify the right side of the equation:

[tex]4^{((2/5) * (1/4))} = 4^{(2/5 * 1/256)} = 4^{(1/1280)}[/tex]

So, the expression [tex](4^{(2/5)})^{(1/4)}[/tex] can be rewritten as the radical expression [tex]4^{(1/1280)}.[/tex]

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Nolan and his children went into a grocery store and he bought $9 worth of apples and bananas, The three ways are explained below

Generally, One way to determine the number of apples, x, and the number of bananas, y, that Nolan bought is to use the equation:

x + y = a (total number of apples and bananas)

0.75x + 0.5y = 9 (total cost of apples and bananas)

Another way is to use the equation:

x = y + 2 (number of apples is 2 more than the number of bananas) 0.75x + 0.5y = 9 (total cost of apples and bananas)

A third way is to use the equation

y = x - 2 (number of bananas is 2 less than the number of apples)

0.75x + 0.5(x-2) = 9 (total cost of apples and bananas)

You can then solve for x and y using either of the above equations.

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If Zack deposited $4,533 in an account earning 5.9% interest compounded annually. The amount he will have in 1 year is: $4,807.79.

Using this formula to find the compounded amount

A = P(1+r/n)^nt

Where:

A = Amount = ?

P = Principal = $4,533

R = Interest rate = 5.9% or 0.059

n = Number of months = 12

t = Time = 1 years

Let plug in the formula

A = $4,533 (1+ 0.059/12)^1×12

A = $4,533 (1+.004916)^12

A = $4,533 (1.004916)^12

A = $4,533 (1.0606)

A = $4,807.79

Therefore the amount he will have in 1 year is: $4,807.79.

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To find the domain and range, the function we simply solve the equation y=f(x) to determine the values of the independent variable x and obtain the domain.

Domain: In simple words, the domain is the set of values of x for which function f(x) is defined,  and also the set of values of x for which we can calculate the value of f(x)

Range: The range of function can define as the set of values of f(x) for the value of its domain

For finding the domain of any function f(x) ..find the value of all x for which function f(x) is defined

For finding the value of the range of function f(x), calculate the value of f(x) for all values of x in the set of domains of f(x)

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Answer:

yes dont listen to anything isay because i just wants the points its to harda for me

Step-by-step explanation:

No these ratios 1/2 is not equal to 2/3 because 2/3 is not the multiple of 1/2

What is an equivalent ratios?

A ratio compares two quantities named as antecedent and consequent, by the means of division. For example, when we cook food, then each ingredient has to be added in a ratio. Thus, we can say, a ratio is used to express one quantity as a fraction of another quantity.

Two ratios are equivalent to each other if one of them can be expressed as the multiple of the other. Hence, to get the equivalent ratio of another ratio, we have to multiply the two quantities (antecedent and consequent) by the same number.

Given ratios are 2:1 and 3:1

we can write it as 2/1 and 3/1.

The lcm of 2 and 3 is 6.

Multiply denominator of both ratio with 6, we get

2/6 and 3/6 And we can see both the ratios are not equal.

Hence, there are not equivalent ratios.

4:1 and 8:3 are equivalent ratios -----> is false, because 4:1 is equivalent to 8:2

11:2 and 2:11 are equivalent ratios------> is false (because, are reciprocal ratios, not equivalent ratios)

3:1 and 9:3 are equivalent ratios ------> is true

because 3:1 multiply both sides by 3 -----> 3*3:1*3=9:3

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Answer:

The equation csc^5 (theta) - 4 csc (theta) + 1 = 0 can be solved by factoring the left-hand side of the equation.

csc^5 (theta) - 4 csc (theta) + 1 = 0

csc (theta) (csc^4 (theta) - 4) + 1 = 0

csc (theta) (csc^2 (theta) - 2)(csc^2 (theta) + 2) + 1 = 0

We can see that the last expression is a polynomial equation of the form (ax+1)(bx^2+c*x+d)=0 where x= csc(theta) , a=1, b=1, c= -2, d=2

Solving for x = 0, we get x=0 which is not a valid solution because csc(theta) is defined only for theta != k*pi where k is an integer.

Solving for x= -1/2 and x= 1/2, we get csc(theta) = -1/2 and csc(theta) = 1/2

To find theta, we can use the reciprocal cosecant function (csc) which is defined as 1/sin(theta)

csc(theta) = -1/2 => sin(theta) = -2

csc(theta) = 1/2 => sin(theta) = 2

Answer: 0 is cos^4(theta) = (4 - 1/sin(theta))(1-sin^2(theta))^2.

Step-by-step explanation: To solve the equation csc^5(theta) - 4csc(theta) + 1 = 0, we can use the identity csc^n(theta) = 1/sin^n(theta).

First, we can apply the identity:

1/sin^5(theta) - 4/sin(theta) + 1 = 0

Next, we can factor out sin(theta) from the first two terms:

sin(theta)(1/sin^4(theta) - 4) + 1 = 0

We can then use the identity sin^2(theta) = 1 - cos^2(theta) to rewrite the first term:

sin(theta)(1 - cos^4(theta)/(1-cos^2(theta))^2 - 4) + 1 = 0

We can then divide both sides of the equation by sin(theta), and we get:

1 - cos^4(theta)/(1-cos^2(theta))^2 - 4 + 1/sin(theta) = 0

We can then simplify this equation to get:

cos^4(theta)/(1-cos^2(theta))^2 = 4 - 1/sin(theta)

By using the identity cos^2(theta) = 1-sin^2(theta) we can simplify the equation further:

cos^4(theta) = (4 - 1/sin(theta))(1-sin^2(theta))^2

So to find the solution we can use double angle identities to simplify the right side of the equation.

Therefore, the solution to the equation csc^5(theta) - 4csc(theta) + 1 = 0 is cos^4(theta) = (4 - 1/sin(theta))(1-sin^2(theta))^2.

Answer:

The vertex of a parabolic function like V(x) = 325x² - 4600x + 145000 can be found by using the vertex form of the equation, which is y = a(x-h)² + k. In this form, (h,k) is the vertex of the parabola. To convert the equation V(x) = 325x² - 4600x + 145000 into vertex form, we can complete the square to get the following:

V(x) = 325(x² - 14x) + 145000

To complete the square we will add and subtract (14/2)² = 49

V(x) = 325(x-7)² + 145000 - 49*325 = 325(x-7)² + 138375

So the vertex of the parabola is (h,k) = (7, 138375).

The vertex of a parabolic function represents the minimum or maximum point of the parabola, depending on whether the parabola opens upwards or downwards. In this case, the vertex represents the maximum value of the home. It means that the value of the home reaches its highest point at 7 years after 2020, and this highest point is 138375.

So in terms of the value of the home, the vertex of the function represents the point at which the housing market reaches its peak, after which the value of the home begins to decrease.

The data set that represented by the dot plot given is:

D. {145, 165, 165, 165, 165, 165, 175, 175, 175, 175, 175, 175, 185}

In a dot plot, each data point in a data set is represented by a dot.

To find out the data set that is represented in the dot plot, list out the data points as plotted on the dot plot given.

In the given dot plot that is showing the pulse rates of runners after finishing a marathon, it can be seen that,

There are 1 dot on 145, 5 dots on 165, 6 dots on 175 and 1 dot on 185.

Thus:

Therefore, the data set that represented by the dot plot given is:

D. {145, 165, 165, 165, 165, 165, 175, 175, 175, 175, 175, 175, 185}

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The final answers are as follows gross profit $321,600, cost of goods sold of $528,000 and balance due $782,980.

(a) The terms of the sale are 3/10, n/30 which means that if Cullumber Company pays the invoice within 10 days, they will receive a 3% discount on the total invoice amount. However, if they pay within 30 days, they will not receive a discount.

To calculate the amount due if Cullumber Company takes the discount:

$914,000 x 3/100 = $27,420

$914,000 - $27,420 = $886,580

To calculate the gross profit:

$914,000 - $592,400 = $321,600

(b) The return of merchandise means that Cullumber Company is returning $104,600 worth of merchandise and thus the amount due to Marin will be:

$886,580 - $104,600 = $782,980

And the cost of goods sold will be:

$592,400 - $64,400 = $528,000

(c) On March 12, Marin Company received the balance due from Cullumber Company which is $782,980.

This means that the net amount received by Marin Company after the discount and return of merchandise is $782,980.

Therefore, The final answers are as follows gross profit $321,600, cost of goods sold of $528,000 and balance due $782,980.

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Answer:

8000

Step-by-step explanation:

bc if its 3 picnic its its 8000

Answer:

The image attached

Step-by-step explanation:

Put the equation into slope-intercept form

[tex]y=mx+b[/tex]

The equation should look like this

[tex]y=-\frac{1}{4}x-2[/tex]

Graph the equation with the slope being  [tex]-\frac{1}{4}[/tex] and [tex]-2[/tex] being the y-intercept.

The measure of [tex]$\angle CAB = 180^{\circ} - \angle ACD$[/tex]

What is the circumscribed circle?

A circumscribed circle is a circle that is drawn around a polygon such that the circle touches all the vertices of the polygon. In other words, the vertices of the polygon lie on the circumference of the circle.

Given that a circle is circumscribed around a quadrilateral ABCD, it is clear that the circle passes through all four vertices of the quadrilateral, A, B, C and, D. Also, the diameter of the circle is the diagonal AC of the quadrilateral.

The angles formed by the diameter with the tangents from the non-adjacent vertices are supplementary. That is [tex]$\angle CAB + \angle ACD = 180^{\circ}$[/tex]

Therefore, the measure of [tex]$\angle CAB = 180^{\circ} - \angle ACD$[/tex]

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D. The retail price of the phone is given as follows: 42.

E. The percent reduction in the price to $31.50 is given as follows: 25%.

The prices and the percentages are obtained applying the proportions in the context of this problem.

The purchase price is given as follows:

$12.

The markup rate is given as follows:

250%.

Meaning that the retail price is of 100% + 250% = 350% of the purchase price, hence it's value is obtained as follows:

3.5 x 12 = $42.

The percentage reduction is given by the reduction in the price divided by the initial price and then multiplied by 100%.

The reduction from $42 to $31.50 is given as follows:

42 - 31.50 = $10.50.

Hence the percent reduction is given as follows:

10.5/42 x 100% = 25%.

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Answer:

(- 4, - 2 ) and (- 1, 2 )

Step-by-step explanation:

to determine which ordered pairs make the equation true

substitute the x and y coordinates of each point into the left side of the equation and if  equal to the right side then it is a solution.

(3, - 1 )

4(3) - 3(- 1) = 12 + 3 = 15 ≠ - 10 ← not true

(- 4, - 2 )

4(- 4) - 3(- 2) = - 16 + 6 = - 10 ← true

(1, 4 )

4(1) - 3(4) = 4 - 12 = - 8 ≠ - 10 ← not true

(- 1, 2 )

4(- 1) - 3(2) = - 4 - 6 = - 10 ← true

7 white pairs coincide when upper half is folded over the centerline.

What is triangle ?

A triangle is a three-sided polygon that has three straight sides and three angles. The sum of the angles in a triangle is always 180 degrees. Triangles are classified based on their side lengths or angle measures.

We know that each half of the figure is composed of 3 red triangles, 5 blue triangles and 8 white triangles.

When the upper half is folded down over the centerline, 2 pairs of red triangles coincide, as do 3 pairs of blue triangles. there are 2 red-white pairs.

So, 2 red triangles + 3 blue triangles + 2 red-white pairs = 7 pairs of triangles that coincide

The total number of triangles in each half of the figure is 3 red triangles + 5 blue triangles + 8 white triangles = 16

If 7 pairs of triangles coincide, then 16 - 7 = 9 pairs do not coincide.

And since 2 red-white pairs coincide, then the remaining 9 - 2 = 7 pairs must be white pairs.

So 7 white pairs coincide when upper half is folded over the centerline.

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Answer:

24

Step-by-step explanation:

There are 4 sides to a box. Meaning you will have to divide 96 by 4. Giving you 24. Since perimeter means to add, add 24 4 times and you will be given the result of 96.

The required solution of the given simultaneous equation is x = 5 and y = -9.

Simultaneous linear equations are two- or three-variable linear equations that can be solved together to arrive at a common solution.

here,
Given a system of equations,
6x + 5y = -15 - - - - -(1)
-4x - y = -11 - - - - (2)

Multiply equation 1 by 1 and multiply equaiton 2 by 5 then add both the equation,
6x + 5y -20x -5y = -15 -55
-14x = -70
x = 5

Now,
-4(5) - y = -11
-20 - y = -11
-y = -11 +20
y = -9

Thus, the required solution of the given simultaneous equation is x = 5 and y = -9.

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Ms. Young should use the data to decide on her next steps.

Data in math is any information that is used to make decisions and/or can be used to analyze patterns. It can be numerical, such as statistics, or qualitative, such as observational data. Data can be collected in various ways, including surveys, experiments, and observations. Data can also be represented graphically, such as in charts or diagrams, to help better illustrate the patterns or trends it may contain. Data is often used in the context of problem solving and decision making and is a key element in the scientific method.

She should identify the areas of difficulty for Kim, where she is having trouble identifying coins. She should then design lessons that focus on these areas, providing more practice on identifying coins. Using a variety of instructional strategies, such as hands-on activities, games, and visual aids, can help Kim to better understand the differences between the coins and increase her accuracy. Additionally, Ms. Young should provide more frequent feedback to Kim on her performance to ensure that she is making progress. Finally, Ms. Young should consider decreasing the number of coins presented to Kim each day, to give her more time to practice and increase her accuracy.

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Answer:

6

Step-by-step explanation:

you have to count the 2d faces

Answer:

6 faces

Step-by-step explanation:

DCGH

BCDA

BCGF

ADHE

BFEA

FGHE