I NEED HELP ASAP PLEASE! About what percentage of the data lies within 2 standard deviations of the mean in a normal distribution?
47.5%
68%
95%
99.7%

The amplitude of the cosine function "y = cos(x)" is 1. Therefore, the correct answer is "d. 1", as it represents the maximum absolute value of the function.

The function "y = cos(x)" represents a cosine function, and its amplitude is the maximum absolute value of the function. The amplitude of the cosine function "cos(x)" is 1. This is because the cosine function oscillates between -1 and 1, and the amplitude is the absolute value of this maximum value.

In mathematical terms, the amplitude (A) of a cosine function "A cos(x)" is equal to the absolute value of the coefficient of the cosine term. In this case, "A = |1| = 1".

Therefore, among the given options:

a. 2

b. π

c. 2π

d. 1

The correct answer is "d. 1" as it accurately reflects the amplitude of the cosine function "y = cos(x)".

The question probable may be:

The graph given above shows the following function y= cos(x)

What is the amplitude of the function?

a. 2

b. pi

c. 2pi

d. 1

Answer:

The reason why both have the same value is because you are only moving the decimal place. The difference between 51.2 and 5.12 is that you divided 10 from 51.2 to get 5.12. Same goes for 6.4 and 0.64.

51.2 / 6.4 = 8

5.12 / 0.64 = 8

Final answer:

The quotient of 51.2 divided by 6.4 is the same as 5.12 divided by 0.64 because both numerators and denominators are related by a factor of 10. This maintains the value of the quotient unchanged when both are multiplied or divided by the same power of 10.

Explanation:

When dividing two numbers, you can often simplify the expression by dividing both numbers by a common factor. In this case, both 51.2 and 6.4 have a common factor of 0.64. Dividing both numbers by 0.64, we get:

51.2 ÷ 0.64 = 80

6.4 ÷ 0.64 = 10

So, as you can see, the result is the same: 80 divided by 10 is equal to 8. This is why dividing 51.2 by 6.4 has the same value as dividing 5.12 by 0.64.

Final answer:

To rewrite expressions as a power of 2, one needs to understand exponent rules and binary representation. Squaring exponentials involves squaring the base and multiplying the exponent by 2. Simplification often involves adjusting prefactors and exponents while keeping the expression equivalent.

Explanation:

To rewrite expressions as a power of 2, it's important to understand how to manipulate exponents and to be familiar with the binary representation of numbers. For instance, squaring exponentials involves squaring the base number and multiplying the exponent by 2. As an example, if you have (23)4, it is the same as 23×4 or 212.

When dealing with decimal equivalents of powers of two, such as 1837, which can be written as (1 × 1024) + (1 × 512) + (1 × 256) + (0 × 128) + (0 × 64) + (1 × 32) + (0 × 16) + (1 × 8) + (1 × 4) + (0 × 2) + (1×1), the expression is already in powers of two. Similarly, recognizing patterns can help simplify expressions, for example, 24 × 1012 can be simplified by adjusting the prefactor and exponent to maintain equivalence.

Finally, powers are applied to everything inside parentheses. For instance, (27×3) and (4×22) becomes 2.1 × 10-33 when raised to the proper power.

The surface area of the decoration is 126 inches².

The area of a three dimensional object on it's outer surface is called the surface area of the object.

We have that, the holiday decoration is a construction from two square pyramids that are joined together at their bases.

Total surface area of a square pyramid = Area of the square + Area of 4 triangular faces

But total surface area of the decoration does not contain the area of the square base as it is joined together.

So surface area of the decoration = Area of 8 triangular faces

                                                        = 8 × ([tex]\frac{1}{2}[/tex] a l)

Here a is the length of the edge of the square and l is the slant height of the triangle.

Surface area = 4 a l

                     = 4 × 4.5 × 7

                     = 126 inches²

Hence the surface area of the decoration is 126 inches².

To learn more about Surface Area, click on the link :

https://brainly.com/question/29101132

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To find the surface area of the holiday decoration, calculate the sum of the areas of the two square pyramids. Use the formula Surface Area = Base Area + 2 * (0.5 * Base Perimeter * Slant Height) and substitute the given values to find the surface area. The surface area of the decoration is 146.25 square inches.

To find the surface area of the holiday decoration, you need to find the sum of the areas of the two square pyramids. The formula for the surface area of a square pyramid is given by:

Surface Area = Base Area + 2 * (0.5 * Base Perimeter * Slant Height)

Since the base is a square, the base area is equal to the side length squared. Therefore, the base area is 4.5 inches * 4.5 inches = 20.25 square inches.

The base perimeter is equal to 4 times the length of one side. Therefore, the base perimeter is 4 * 4.5 inches = 18 inches.

Plugging these values into the formula, we have Surface Area = 20.25 square inches + 2 * (0.5 * 18 inches * 7 inches).

Simplifying the expression, we get Surface Area = 20.25 square inches + 2 * 63 square inches = 146.25 square inches.

Answer:

The value of x is 42°.

Step-by-step explanation:

Given AB and BC are perpendicular lines which means that AB is 90° to BC. So in order to find the value of x, you have to substract 24° and 24° from 90° :

[tex]24° + x + 24° = 90°[/tex]

[tex]x = 90° - 24° - 24°[/tex]

[tex]x = 42°[/tex]

Answer:

x = -31

Step-by-step explanation:

x-19=2x+12

Subtract x from each side

x-x-19=2x-x+12

-19 = x+12

Subtract 12 from each side

-19-12=x+12-12

-31 =x

Step-by-step explanation:

Putting values of x and y

2 = 4 + 2

2 = 6

= 6-2

= 4

Answer:

cos2θ = -0.7041

Cos θ = -0.3847

Step-by-step explanation:

Firstly, we should understand that since θ is in quadrant 2, the value of our cosine will be negative. Only the sine is positive in quadrant 2.

Now the sine of an angle refers to the ratio of the opposite to the adjacent. And since there are three sides to a triangle, we need to find the third side which is the adjacent so that we will be able to evaluate the cosine of the angle.

What to use here is the Pythagoras’ theorem which states that the square of the hypotenuse is equal to the sum of the squares of the adjacent and the opposite.

Since Sine = opposite/hypotenuse, this means that the opposite is 12 and the hypnotist 13

Thus the adjacent let’s say d can be calculated as follows

13^2 = 12^2 + d^2

169 = 144 + d^2

d^2 = 169-144

d^2 = 25

d = √25 = ±5

Since we are on the second quadrant, the value of our adjacent is -5 since the x-coordinate on the second quadrant is negative.(negative x - axis)

The value of cos θ = Adjacent/hypotenuse = -5/13

Cos θ = -5/13

Cos θ = -0.3846

Using trigonometric formulas;

Cos 2θ = cos (θ + θ) = cos θ cos θ - sin θ sin

θ = cos^2 θ - sin^2 θ

Cos 2θ = (-5/13)^2 - (12/13)^2

Cos 2θ = 25/169 - 144/169

Cos 2θ = (25-144)/169 = -119/169

Cos 2θ = -0.7041

There are four quadrants in a coordinate geometry.

The cosine values are [tex]\mathbf{ cos(\theta)=- \frac{5}{13}}[/tex] and [tex]\mathbf{ cos(2\theta) = -\frac{119}{169}}[/tex]

The given parameter is:

[tex]\mathbf{sin(\theta) = \frac{12}{13}}[/tex]

Using trigonometry ratio, we have:

[tex]\mathbf{sin^2(\theta) + cos^2(\theta)= 1}[/tex]

Substitute [tex]\mathbf{sin(\theta) = \frac{12}{13}}[/tex]

[tex]\mathbf{(\frac{12}{13})^2 + cos^2(\theta)= 1}[/tex]

Expand

[tex]\mathbf{\frac{144}{169} + cos^2(\theta)= 1}[/tex]

Collect like terms

[tex]\mathbf{ cos^2(\theta)= 1-\frac{144}{169}}[/tex]

Evaluate fraction

[tex]\mathbf{ cos^2(\theta)= \frac{25}{169}}[/tex]

Take square roots of both sides

[tex]\mathbf{ cos(\theta)= \pm \frac{5}{13}}[/tex]

The angle is in the second quadrant.

So, we have:

[tex]\mathbf{ cos(\theta)=- \frac{5}{13}}[/tex]

Also, we have:

[tex]\mathbf{ cos(2\theta) = cos^2(\theta) - sin^2(\theta)}[/tex]

So, the equation becomes

[tex]\mathbf{ cos(2\theta) = \frac{25}{169} - \frac{144}{169}}[/tex]

Take LCM

[tex]\mathbf{ cos(2\theta) = \frac{25-144}{169}}[/tex]

[tex]\mathbf{ cos(2\theta) = -\frac{119}{169}}[/tex]

Hence, the values are:

[tex]\mathbf{ cos(\theta)=- \frac{5}{13}}[/tex] and [tex]\mathbf{ cos(2\theta) = -\frac{119}{169}}[/tex]

Read more about quadrants at:

https://brainly.com/question/7196054

Answer:

2 • (2x - 3) • (3x - 2)

Step-by-step explanation:

Answer:

4x + 6(3x -2)

First distribute

4x + 18x - 12

Combine like terms

22x - 12

Step-by-step explanation:

Step-by-step explanation:

¡Hola a todos!

Usa la fórmula para una esfera:

[tex]V=\frac{4}{3} \pi r^3[/tex]

[tex]V=\frac{4}{3} \pi (125)\\V=523.59877 mm^3[/tex]

No soy un hablante nativo de español, así que esto puede ser un poco confuso, ¡pero espero que ayude!

:)

Answer:

The ratio of the height of the cone to the height of the cylinder is 3 to 1

The ratio of the height of the cone to the radius of the sphere is 4 to 1

Step-by-step explanation:

First we need to know the volume of a cylinder, a cone and a sphere:

V_cylinder = pi*r^2*h

V_cone = (1/3)*pi*r^2*h

V_sphere = (4/3)*pi*r^3

If they have the same volume:

The ratio of the height of the cone to the height of the cylinder is:

V_cone / V_cylinder = 1

(1/3)*pi*r^2*h1 / pi*r^2*h2 = 1

(1/3) * h1 = h2

h1 / h2 = 3

So the ratio is 3 to 1

The ratio of the height of the cone to the radius of the sphere is:

V_cone / V_sphere = 1

(1/3)*pi*r^2*h / (4/3)*pi*r^3 = 1

h / 4r = 1

h / r = 4

So the ratio is 4 to 1

Answer:

The area is 36

Step-by-step explanation:

hope it helps :3

multiple the length x width

6x6=36

Answer:

[tex]5400cm^{3}[/tex] more water could be added to the container before the container overflows

Step-by-step explanation:

The volume of the rectangular container is got by multiplying its given dimensions: Length X breadth X height

This will be  30 X 20 X 24 = [tex]14400 cm^{3}[/tex]

To find the volume of water inside the rectangular container, we will use the new height for our computation of volumes, keeping the length and breadth of the cylinder the same.

This will be [tex]30 \times 20 \times 15 =9000 cm^{3}[/tex]

The volume of water needed to be added until the container overflows will be got by subtracting the volume of water present in the container from the total volume of the container

[tex]14400 - 9000 =5400cm^{3}[/tex]

Note 1 [tex]cm^{3}= 1 ml[/tex]

Answer:

120 Ways

Step-by-step explanation:

The permutation of the word 'cheese' considers the unique arrangements of its letters. Since 'e' repeats thrice, the permutations are calculated using the formula for a multiset, resulting in 120 unique permutations.

The term 'permutation' typically refers to the possible arrangements of a set of items when the order of these items is important. In the context of English and the word 'cheese,' permutation would normally mean all the distinct arrangements of the letters in the word. However, since the letters 'e' and 'c' repeat in the word 'cheese,' the number of unique permutations is less than it would be if all the letters were different.

To calculate the permutations of 'cheese' specifically, we would have to account for these repeated letters. With six letters total and the letter 'e' appearing three times, we would use the formula for permutations of a multiset: 6! / (3! 1! 1! 1!), where the factorials represent the number of times each distinct letter occurs.

Answer:

Actual dimension of the field = 42 ft × 21 ft

Equation : [tex]y=\frac{7}{2}x[/tex]

Step-by-step explanation:

Scale for the drawing of a rectangular playing field is,

2 inches = 7 feet

Or 1 inch = 3.5 feet

If length of the playing field on drawing = 12 in

Then actual length of the field = 12×3.5 = 42 feet

And width on the drawing = 6 inches

Therefore, actual width of the field = 6×3.5 = 21 feet

If 'x' is the dimension of a scale drawing and 'y' be the corresponding dimension of the actual field,

[tex]\frac{x}{y}=\frac{2}{7}[/tex]

[tex]y=\frac{7}{2}x[/tex]

Answer:

Im not sure but I thinks its the first one

f(x)=8(4)

Step-by-step explanation:

Answer:

b

Step-by-step explanation:

Answer:

The length of the equal side is 27 meters each and that of the unequal side is 36 meters

Step-by-step explanation:

An isosceles triangle is a triangle with two sides being equal (also two equal base angles).

Let us assume the length of the two equal sides to be x meters each, and the length of the unequal side to be y meter. Since the perimeter of the triangle is 90 m, it can be expressed as:

x + x + y = 90

2x + y = 90

But the length of the equal side is  three fourth of the unequal side, i.e x = 3/4y

Therefore:

2(3/4y) + y = 90

3/2y + y = 90

2.5y = 90

y = 90/2.5

y = 36 meters

Also x = 3/4 * 36 = 27 meters

The length of the equal side is 27 meters each and that of the unequal side is 36 meters

Steps to solve:

-4(r + 3) = -42

~Distribute

(-4 * r) + (-4 * 3) = -42

~Simplify

-4r - 12 = -42

~Add 12 to both sides

-4r - 12 + 12 = -42 + 12

~Simplify

-4r = -30

~Divide -4 to both sides

-4r/-4 = -30/-4

~Simplify

r = 7.5

Best of Luck!

Answer:

7.5

Step-by-step explanation:

(-4) (7.5 + 3)= -42

Answer:

25 cubic feet of concrete

Step-by-step explanation:

Given the information:

=>The volume of concrete darryl need for the highest stair is:

The volume of the staircase - the volume of the lowest stair -  the volume of middle stair

= 34 -  3 - 6

= 25 cubic feet of concrete

Hope it will find you well.

Answer:

Step-by-step explanation:

Answer:

612

Step-by-step explanation:

The lateral surface area does not include the bases.

The bases are the triangles

We will add up the areas of the three rectangles

We have the two rectangles on the sides which are 17 by 13 and the rectangle on the bottom which is 17 by 10

17* 13 + 17*13 + 17*10 =612

Answer:

I think it's D, sorry if i'm wrong but let me know if I'm right!

Step-by-step explanation:

Answer:

3. Look at the least amount of time practicing. That is 1/4 hours. Then look at the most time practicing, an hour and a half. Subtract 1  1/2 by 1/4.

4. Look at the dots in the plot. The one in the middle is the highest because it appears the most. The most common time is 3/4 of an hour.

5. To see the total time, add all of the numbers up, including the repeated ones.

Answer:

I think its 46...

Step-by-step explanation:

Answer:

the answer is 40

Step-by-step explanation:

15+8+17=40

Answer:

50 cents each

Step-by-step explanation:

3.50/7 = .50

Answer:

Each cup costs $0.50

Step-by-step explanation:

Take the total cost and divide by the number of cups

3.50/7 = .50

Each cup costs $0.50

Answer:

212

Step-by-step explanation:

volume of new figure = sum of the two individual figures

volume of one cuboid=l*b*h

volume of first cuboid=92

volume of second  cuboid=120

sum of two figures=212

hope this helps

plzz mark me brainliest

Answer:

212 is the answer

Step-by-step explanation:

First to find the area of the first figure, you must use the formula for volume: length times width times height.

so: 23(2)(2) is equal to 92.

then for the second figure: 8(5)(3) is equal to 120.

now you add the two answers.

92+120=212

Answer:

6    

Step-by-step explanation:

Answer:

11

Step-by-step explanation:

Put the numbers in order from smallest to largest

10, 12,13, 15, 17, 18,  21,

The range is the largest number minus the smallest number

21-10

11

Answer:

x = - 1/6 + √-119/6, and, - 1/6 - √-119/6

Step-by-step explanation:

Using the quadratic formula which is: - b ± √b² - 4ac / 2a

a = 3, b = 1, c = 10

- 1 ± √1² -4 * 3 * 10 / 2 * 3

- 1 ± √1 - 120 / 6

-1 ± √-119 / 6

= -1/6 + √119/6,               or                  - 1/6 - √-119/6

Answer:

[tex] y - \frac{7}{2}= \frac{1}{2} (x-4)[/tex]

[tex] y-\frac{7}{2}= \frac{1}{2}x - 2[/tex]

[tex] y = \frac{1}{2}x -2 + \frac{7}{2}[/tex]

[tex] y = \frac{1}{2}x + \frac{3}{2}[/tex]

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

Is given by:

Ο 3/2

Step-by-step explanation:

For this case we have the following function given:

[tex] y - \frac{7}{2}= \frac{1}{2} (x-4)[/tex]

If we distribute the 1/2 in the right we got:

[tex] y-\frac{7}{2}= \frac{1}{2}x - 2[/tex]

Now we can add on both sides 7/2 and we got:

[tex] y = \frac{1}{2}x -2 + \frac{7}{2}[/tex]

And simplifying we got:

[tex] y = \frac{1}{2}x + \frac{3}{2}[/tex]

And the answer for this case using the general formula:

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

Is given by:

Ο 3/2

Answer:

16 tickets

Step-by-step explanation:

15.50-3.50=12

12/0.75=16

Answer:

4

Step-by-step explanation:

1) to find hcf, first look at what both 12 and 16 are divisible by

12 and 16 are divisible by 2

so

12/2=6

16/2=8

now we have 6,8

6 and 8 are divisible by 2 as well

6/2=3

8/2=4

3,4 is what we are left with

since we had to divide these numbers by 2 both times, multiply them.

2*2=4

4 is the hcf