Help! Will mark brainliest to whoever puts the answer first!

Answer:

A. Area = 5/9 sq.meters

Step-by-step explanation:

Area = (lenght × widht)

\(A=(\frac{5}{6} )(\frac{2}{3}) =\frac{(5)(2)}{(6)(3)} =\frac{10}{18}\)

simplified

\(A=\frac{5}{9}\)

Hope this helps

Answer:

\(\dfrac{3}{10}\)

Step-by-step explanation:

Length of an arc\(=\dfrac{\theta}{2\pi}X 2\pi r=\theta r\)

If the central angle of the arc is \(\dfrac{3\pi}{5}\)

Length of an arc\(=\dfrac{3\pi r}{5}\)

Therefore:

Ratio of the length of the arc to the circumference

\(=\dfrac{3\pi r}{5}:2\pi r\\=\dfrac{3\pi r}{5*2\pi r}\\=\dfrac{3}{10}\)

Therefore, the arc is \(\dfrac{3}{10}\) of the circumference is this arc.

Answer: 3 /10

Step-by-step explanation: Khan Academy

Positional numeration is a system of representing numbers using positional notation. In this system, each digit represents a multiple of the base of the number system, which is usually 10 in our decimal system. The number 3.15569 x 10^7 in positional numeration is 31,556,900.

The value of a digit is determined by its position, with the rightmost digit representing the ones place, the next digit to the left representing the tens place, and so on. To convert the given number, 3.15569 x 10^7, into positional numeration, we first need to express it in scientific notation. In scientific notation, a number is expressed as a product of a coefficient and a power of 10. In this case, the coefficient is 3.15569, and the power of 10 is 7. Therefore, the given number can be expressed as: 3.15569 x 10^7

To convert this number into positional numeration, we can simply multiply the coefficient by the power of 10. This can be done by moving the decimal point of the coefficient 7 places to the right, since 10^7 is a power of 10 with exponent 7. The resulting number is: 31,556,900

Therefore, the number 3.15569 x 10^7 in positional numeration is 31,556,900. It is important to remember that positional numeration is a system of representing numbers using positional notation based on the base of the number system, which is usually 10 in our decimal system.

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Answer:

9 digits

Step-by-step explanation:

when doing multiplication with decimals the amount of digits after the decimal in the final product will be the sum of the amounts of digits after the decimal in the two numbers being multiplied together

For example, If you were to multiply 6.789 by 10.321 the answer would be 70.069269. There are six digits after the decimal because the numbers being multiplied each have three digits after their decimals

(If that makes sense. If not, I'm sorry)

(a) To compute\(E_e_n\)(X), we need to find the expectation value of the operator X in the state ψ_n.

The operator X corresponds to the position of the particle. The expectation value of X in the state ψ_n is given by:

\(E_e_n\)(X) = ∫ ψ_n* X ψ_n dx,

where ψ_n* represents the complex conjugate of ψ_n. Since ψ_n = √(2/a) sin(nπx/a), we can substitute these values into the integral:

\(E_e_n\)(X) = ∫ (2/a) sin(nπx/a) * X * (2/a) sin(nπx/a) dx.

The integral is taken over the interval [0, a]. The specific form of the operator X is not provided, so we cannot calculate \(E_e_n\)(X) without knowing the operator.

(b) To compute \(E_v_n\)(X^2), we need to find the expectation value of the operator X^2 in the state ψ_n. Similar to part (a), we can calculate it using the integral:

\(E_v_n\)(X^2) = ∫ (2/a) sin(nπx/a) * X^2 * (2/a) sin(nπx/a) dx.

Again, the specific form of the operator X^2 is not given, so we cannot determine \(E_v_n\)(X^2) without knowing the operator.

(c) To compute E_ψ_n(P), we need to find the expectation value of the momentum operator P in the state ψ_n. The momentum operator is given by P = -iħ(d/dx). We can substitute these values into the integral:

E_ψ_n(P) = ∫ ψ_n* P ψ_n dx

        = ∫ (2/a) sin(nπx/a) * (-iħ(d/dx)) * (2/a) sin(nπx/a) dx.

(d) To compute E_φ˙n(P^2), we need to find the expectation value of the squared momentum operator P^2 in the state ψ_n. The squared momentum operator is given by P^2 = -ħ^2(d^2/dx^2). We can substitute these values into the integral:

E_φ˙n(P^2) = ∫ ψ_n* P^2 ψ_n dx

          = ∫ (2/a) sin(nπx/a) * (-ħ^2(d^2/dx^2)) * (2/a) sin(nπx/a) dx.

(e) The uncertainty relation in quantum mechanics is given by the Heisenberg uncertainty principle:

ΔX ΔP ≥ ħ/2,

where ΔX represents the uncertainty in the position measurement and ΔP represents the uncertainty in the momentum measurement. To determine the state ψ_n for which the uncertainty is a minimum, we need to find the values of ΔX and ΔP and apply the uncertainty relation. However, the formulas for ΔX and ΔP are not provided, so we cannot determine the state ψ_n for which the uncertainty is a minimum without further information.

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Answer:

0.5 i think

Step-by-step explanation:

To convert kilometers per hour to meters per second, we need to divide by 3.6. Therefore, the parachutist's rate during free fall in meters per second is:

207 km/h ÷ 3.6 = 57.5 m/s

To find the distance the parachutist will fall during 10 seconds of free fall, we can use the formula:

distance = 1/2 x acceleration x time^2

The acceleration due to gravity is approximately 9.8 m/s^2. Therefore, the distance the parachutist will fall during 10 seconds of free fall is:

distance = 1/2 x 9.8 m/s^2 x (10 s)^2 = 490 m

So the parachutist will fall 490 meters during 10 seconds of free fall at a rate of 207 kilometers per hour, which is equivalent to 57.5 meters per second.

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Answer:

4 = dt

I hope this helps

Sorry if it's wrong

Answer:

363-138=-5x

Step-by-step explanation:

Let c = cost

We know that the total cost is $363:

363-??????

We also know that he spent $138 on parts:

363-138?????

And we are solving for the cost of labor per hour:

363-138=5x

We can use this equation to find the total cost of labor per hour.

Hence, your equation will be 363-138=5x

the graph of f(x) = x^3 - 3x^2 - 9x + 5 is concave down on the interval (-∞, 1), concave up on the interval (1, +∞), and has a point of inflection at x = 1.

To determine the intervals on which the graph of a function is concave up or concave down, we need to analyze the second derivative of the function. The concavity of a function can change at points where the second derivative changes sign.

Here's the step-by-step process to find the intervals of concavity and points of inflection:

Find the first derivative of the function, f'(x).

Find the second derivative of the function, f''(x).

Set f''(x) equal to zero and solve for x. The solutions give you the potential points of inflection.

Determine the intervals between the points found in step 3 and evaluate the sign of f''(x) in each interval. If f''(x) > 0, the graph is concave up; if f''(x) < 0, the graph is concave down.

Check the concavity at the points of inflection found in step 3 by evaluating the sign of f''(x) on either side of each point.

Let's go through an example to illustrate this process:

Example: Consider the function f(x) = x^3 - 3x^2 - 9x + 5.

Find the first derivative, f'(x):

f'(x) = 3x^2 - 6x - 9.

Find the second derivative, f''(x):

f''(x) = 6x - 6.

Set f''(x) equal to zero and solve for x:

6x - 6 = 0.

Solving for x, we get x = 1.

Therefore, the potential point of inflection is x = 1.

Determine the intervals and signs of f''(x):

Choose test points in each interval and evaluate f''(x).

Interval 1: (-∞, 1)

Choose x = 0 (test point):

f''(0) = 6(0) - 6 = -6.

Since f''(0) < 0, the graph is concave down in this interval.

Interval 2: (1, +∞)

Choose x = 2 (test point):

f''(2) = 6(2) - 6 = 6.

Since f''(2) > 0, the graph is concave up in this interval.

Check the concavity at the point of inflection:

Evaluate f''(x) on either side of x = 1.

Choose x = 0 (left side of x = 1):

f''(0) = -6.

Since f''(0) < 0, the graph is concave down on the left side of x = 1.

Choose x = 2 (right side of x = 1):

f''(2) = 6.

Since f''(2) > 0, the graph is concave up on the right side of x = 1.

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Answer:

Electricity makes work easier.

We do not have to walk to a river to get water or wash our clothes and we can cook foods by switching a button.

Step-by-step explanation:

Answer:

hi how are you fineeeeee

The equation y = x - 8 is expressed as a slope-intercept form.

The equation is defined as a mathematical statement that has a minimum of two terms containing variables or numbers that are equal.

The slope-intercept form is y = mx+c, where the slope is m and the y-intercept is c.

The equation is given in the question, as follows:

x - y = 8

We have to write it in the slope-intercept form,

As per the question, we have

x - y = 8

Rearrange the variables in the above equation, and we get

y = x - 8

This equation is in the slope-intercept form.

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Answer:

m = -3/2

Step-by-step explanation:

The slope of a line is equivalent to the formula:

m = slope = rise/run = \(\frac{y_{2}-y_{1}}{x_{2}-x_{1}}\)

Given the two coordinate pairs, we can label them accordingly.

In math, coordinate pairs are set up in a way that the x-coordinate is given first and the y-coordinate is given second.

Therefore, with this information, we can label the coordinate pairs with this info.

\((x_{1}, y_{1})\) and \((x_{2}, y_{2})\) is the default labeling system for two coordinate pairs.

Then, we can use this information to label our coordinate pairs, place them into the slope formula, and solve for m.

\(m=\frac{-1-5}{8-4}\\\\m = \frac{-6}{4}\\\\\boxed{m=-\frac{3}{2}}\)

Answer:

8 dolls

Step-by-step explanation:

METHOD 1:

Step 1: Convert 25% into decimal (0.25)

Step 2: Multiply by 32 (32 × 0.25 = 8)

METHOD 2:

25% of a number will be one-fourth of that number. Divide 32 by 4 to get 8 (or multiply 32 by 1/4).

Answer:

-128

Step-by-step explanation:

hope it helps srry if its wroung:>

Answer: sin C = 7/25, cos C = 24/25, tan C = 7/24

Step-by-step explanation: Use trig ratios based on angle C

Answer:

see explanation

Step-by-step explanation:

sin C = \(\frac{opposite}{hypotenuse}\) = \(\frac{AB}{AC}\) = \(\frac{7}{25}\)

cos C = \(\frac{adjacent}{hypotenuse}\) = \(\frac{BC}{AC}\)  = \(\frac{24}{25}\)

tan C = \(\frac{opposite}{adjacent}\) = \(\frac{AB}{BC}\) = \(\frac{7}{24}\)

Answer:

PUT YOUR HANDS UP AND GIVE ME YOUR POINTS!!!

Step-by-step explanation:

hehe

Answer:

The blank is 3

Step-by-step explanation:

1 - Give the blank a variable

x = our blank

2 - Write it out

\(\frac{5}{7} + \frac{x}{6} = \frac{51}{42}\)

3 - Get the denominators equal

\(\frac{5}{7}(\frac{6}{6}) +\frac{x}{6}(\frac{7}{7}) = \frac{51}{42} \\\frac{30}{42}+\frac{7x}{42} = \frac{51}{42}\)

4 - Simplify

\(\frac{30+7x}{42} = \frac{51}{42} \\ \frac{30+7x}{42} = \frac{51}{42}\)

5 - Solve for the numerators

30+7x = 51

-30         -30

      7x = 21

        x = 3

Answer: it’s 3

Step-by-step explanation: Sorry if im wrong lol

      From: me?

Answer:

Step-by-step explanation:

2590

Answer:

17

Step-by-step explanation:

5y - 8 = 9y - 28

-8 = 4y - 28

4y = 20

y = 5

9(5) - 28

45 - 28

17

The value of length SP for the two given similar triangles is 11.

Similar triangles are triangles that have the same shape but are different in size. In other words, their corresponding angles are equal, and their corresponding sides are proportional.

This means that if you were to take one of the similar triangles and enlarge or shrink it, while keeping the angles the same, it would still be a similar triangle.

The value of length SP is calculated by applying the following method;

|SP| = |ST|

3x + 2 = 5x - 4

3x - 5x = -4 - 2

-2x = - 6

x = 3

Length SP = 3x + 2

                 = 3(3) + 2

                 = 11

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Answer:

Step-by-step explanation: you need to dived by3000

Answer:

See below.....Something is wrong with your question

Step-by-step explanation:

v = k d^3    or     k = v/d^3   = 576/12^3 = 1/3

when depth (???   m??)  is 1300 :

  1/3 =  v / (1300^3)  = 732 333 333 .3 cm^3

Answer:

7.719

Step-by-step explanation:

Answer:

twice

Step-by-step explanation:

??

Answer:

the height of the right triangle face of the cheese block is 17 centimeters.

Step-by-step explanation:

We can use the formula for the volume of a triangular prism to solve for h:

Volume = (1/2) × base × height × length

where the base is the length of the triangle, the height is the height of the triangle, and the length is the length of the prism.

We know that the volume of the cheese is 969 cubic centimeters, so we can substitute the given values into the formula:

969 = (1/2) × 12 × 9 × h

Multiplying both sides by 2, we get:

1938 = 12 × 9 × h

Dividing both sides by (12 × 9), we get:

h = 1938 ÷ (12 × 9) = 17

Therefore, the height of the right triangle face of the cheese block is 17 centimeters.

Answer:

V=301.4cm^3

A=188.4cm^3

I hope it will be useful.

Answer:

Step-by-step explanation:

I. Volume = 301.6 cm³ (to 1d.p)

II. CSA = 188.5 cm² (to 1d.p)

Step-by-step explanation:

Given the following data;

Height, h = 8cm

Radius, r = 6cm

Curved length = 10cm

a. To find the volume of the cone

Where;

V is the volume of the cone.

r is the radius of the base of the cone.

h is the height of the cone.

Substituting into the equation, we have;

Volume = 301.6 cm³ (to 1d.p)

b. The curved surface area of the cone

Where;

CSA is the curved surface area of the cone.

r is the radius of the base of the cone.

l is the curved length of the cone.

Substituting into the equation, we have;

CSA = 188.5 cm² (to 1d.p)

The multiplicative inverse of [c] is [x+1]in the finite field defined by the irreducible polynomial   x²+x+1.

To find the multiplicative inverse of the element [c] in this finite field.

We need to define the irreducible polynomial f(x)=x²+x+1  as the modulus.

Set up the extended Euclidean algorithm with f(x) and x and perform the calculations until the remainder becomes a constant (degree 0) polynomial.

The coefficient of the constant term in the remainder polynomial will be the multiplicative inverse of [c] in the finite field.

The extended Euclidean algorithm:

f(x) = x²+x+1

x = f(x) × 0 + x

x = (x) × (-1) + (x + 1)

-1 = x + 1

Hence, the multiplicative inverse of [c] is [x+1]in the finite field defined by the irreducible polynomial   x²+x+1.

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Answer:

8(×2)+8(×+4)-(4×+9)