pls help!!!!!!!!!

it's also urgent

Answer:

$216.00

Step-by-step explanation:

Final price: $216.00

Saved amount: $54.00

Answer:

The index of refraction of this medium is 1.4

Step-by-step explanation:

The refractive index, n, of a transparent medium is defined as the ratio of speed of light in vacuum to the speed of light in that medium.

Here the given speed of light in a certain medium is 2.2 x \(10^{8}\) and the speed of light is c= 3 x \(10^{8}\)

Refractive index = n= c/v

                                  =3 x \(10^{8}\)/2.2 x \(10^{8}\)

                                  = 1.36

                                  = 1.4

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The refractive index of this medium is 1.4 .

Here the given speed of light in a given medium is 2.2 x 10⁸ and the speed of light is c = 3 x 10⁸

Refractive index = n= c/v

                                 =3 x 10⁸ / 2.2 x 10⁸

                                 = 1.36

                                 = 1.4

The refractive index of this medium is 1.4 .

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Answer: 601 square inches

Step-by-step explanation: the surface area of the cube is 486 sq in. so add that with 115, you get 601 sq in.

Hope this helps!

Answer:

601 square inches

Step-by-step explanation:

Answer:

b=2.5

Step-by-step explanation:

We know that,

Area of a rectangle= Length X Breadth

Perimeter of a rectangle= 2( Length + Breadth)

From the provided information we get that,

Area= Perimeter

lb=2(l+b)

Substituting l=10,

10b=2(10+b)

10b=20+2b

10b-2b=20

8b=20

b=20/8

b=2.5

Answer:

19.63 inches

Step-by-step explanation:

The area of a circle is found by using the formula

A = πr²

r is the radius of the circle, which is the diameter divided by two.

D = 5 in so r = D ÷2

5 ÷ 2 = 2.5 inches for the radius.

A = π (2.5)²

A = π (6.25)

A = (3.14)(6.25)

A = 19.625 inches

Answer:

Step-by-step explanation:

Answer:<DBE+<DBA+<EBC=180(SUM OF INTERIOR ANGLE OF A TRIANGLE is 180)

<DBE+39+53=180

<DBE=180-92=88

88 is the answer. it helps you.

Answer:

88 \

Step-by-step explanation:

The transformation of System A into System B is:

Equation [A2]+ Equation [A 1] → Equation [B 1]"

The correct answer choice is option D

How can we transform System A into System B?

To transform System A into System B as 1 × Equation [A2] + Equation [A1]→ Equation [B1] and 1 × Equation [A2] → Equation [B2].

System A:

-3x + 4y = -23 [A1]

7x - 2y = -5 [A2]

Multiply equation [A2] by 2

14x - 4y = -10

Add the equation to equation [A1]

14x - 4y = -10

-3x + 4y = -23 [A1]

11x = -33 [B1]

Multiply equation [A2] by 1

7x - 2y = -5 ....[B2]

So therefore, it can be deduced from the step-by-step explanation above that System A is ultimately transformed into System B as 1 × Equation [A2] + Equation [A1]→ Equation [B1] and 1 × Equation [A2] → Equation [B2].

The complete image is attached.

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The probability that a student drives to school, given that they are a senior, is approximately 0.71, rounded to the nearest hundredth.

We can use Bayes' theorem to find the probability that a senior student drives to school, given that they are a senior.

First, we need to calculate the probability of a student being a senior:

\(P(senior) = \frac{25+5+5}{(2+25+3+13+20+2+25+5+5)} = \frac{35}{100} = 0.35\)

Next, we need to calculate the probability of a senior student driving to school:

P(drive ∩ senior) = 25/100 = 0.25

Now we can apply Bayes' theorem:

P(drive | senior) = P(drive ∩ senior) / P(senior)

P(drive | senior) = 0.25 / 0.35 ≈ 0.71

Therefore, the probability that a student drives to school, given that they are a senior, is approximately 0.71, rounded to the nearest hundredth.

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point B is located in quadrant II (option B)

Point A: (6, 3) = (x, y)

reflection of point A across the y axis:

The x coordinate will be negative and the y coordinate will remain the same

reflection of point A across the y axis = (-6, 3)

Attaching the graph showing the point after reflection:

Since point B is the reflection of point A.

Hence, point B is located in quadrant II (option B)

When the sum of 8 and 18 times a positive number is subtracted from the square of the number, 0 results. The number is 9 + 4√6.

Let us assume that x is a positive number.

Then, as per the question statement, we have;

(x²) - [(8 + 18x)] = 0

Now, we need to solve the given equation to find the value of x, i.e., the positive number.

Here's how we can do it;

(x²) - [(8 + 18x)] = 0

⇒ x² - 8 - 18x = 0

Using the quadratic formula to solve this equation, we get;

$$x=\frac{-b±\sqrt{b^2-4ac}}{2a}$$

Putting the given values in this formula, we get;

$$x=\frac{-(-18)±\sqrt{(-18)^2-4(1)(-8)}}{2(1)}$$

$$x=\frac{18±\sqrt{384}}{2}$$

$$x=\frac{18±8√6}{2}$$

$$x=9±4√6$$

Thus, we have two values for x as follows;

x = 9 + 4√6 or x = 9 - 4√6

However, we know that the given number is positive.

Therefore, the only valid solution is;

x = 9 + 4√6

Therefore, the number is 9 + 4√6.

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Answer:

85/12 (or) 7 1/12

\(\frac{85}{12} (or) 7\frac{1}{12}\)

7.083 repeating

The formula for the volume of a cone is:

V = (1/3)πr²h

where r is the radius of the base, h is the height of the cone, and π is pi.

In this case, the slant height is given as 17 cm, which we can use with the radius to find the height of the cone using the Pythagorean theorem:

h² = s² - r²

h² = 17² - 8²

h² = 225

h = 15

Now that we have the height, we can plug in the values for r and h into the formula for the volume:

V = (1/3)π(8²)(15)

V = (1/3)π(64)(15)

V = (1/3)(960π)

V = 320π

Therefore, the volume of the cone is 320π cubic cm. Answer: 320π.

Answer:2

Step-by-step explanation:

-5.4+8.2=14/5 and then opposite of -2 3/4 is 2.

Answer:

48.5 lbs

Step-by-step explanation:

lkg = 2.205 lbs

22kgs = 2.205 x 22

= 48.51 lbs

= 48.5 lbs (to the nearest tenth)

22 kilograms is equivalent to 48.5 pounds.

Given that we need to convert 22 kilograms to pounds.

We have,

1 lb = 0.4536 kg

1 kg = 2.205 lbs

To convert kilograms to pounds, you can use the conversion factor that 1 kilogram is equal to 2.205 pounds.

Therefore, to convert 22 kilograms to pounds, you can multiply 22 by 2.205:

22 kg x 2.205 lbs/kg = 48.51 lbs

Rounded to the nearest tenth, 22 kilograms is equivalent to 48.5 pounds.

Hence 22 kilograms is equivalent to 48.5 pounds.

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Here is the complete question.

\(Consider \ circle \ Y \ with \ radius \ 3 m \ and \ central \ angle \ XYZ \ measuring \ 70°. \\ \\ What \ is \ the \ approximate \ length \ of \ minor \ arc \ XZ?\\ \\ Round \ to \ the \ nearest \ tenth \ of \ a \ meter. \\ 1.8 meters \\ 3.7 \ meters \\ 15.2\ meters \\ 18.8 \ meters\)

Answer:

3.7 meters

Step-by-step explanation:

From the given information:

The radius is 3m

The central angle XYZ = 70°

To calculate the circumference of the circle:

C = 2 π r

C = 2 × 3.142 × 3

C = 18.852 m

Let's recall that:

The circumference length define a central angle of 360°

The approximate length of minor arc XZ can be determined as follow:

Suppose the ≅ length of minor arc XZ = Y

By applying proportion;

\(\dfrac{18.852}{360} = \dfrac{Y}{70}\)

Y(360) = 18.852 × 70

Y = 1319.64/360

Y = 3.66

Y ≅ 3.7 m

Answer:

B!!! 3.7

Step-by-step explanation:

ON EDG2020

Bellman equation usually refers to the dynamic programming equation associated with discrete-time optimization problems. The maximum value is -1. Therefore V*(s) = -1

In continuous-time optimization problems, the analogous equation is a partial differential equation that is called the Hamilton–Jacobi–Bellman equation. To calculate the value of V*(s) using the given Q* values, we need to find the maximum Q* value among all the actions in state s.

Given:

Q*(s, aj) = -1

Q*(s, a2) = 0

Q*(s, a3) = 0

Q*(s, a4) = 0

To find V*(s), we take the maximum Q* value:

V*(s) = max(Q*(s, aj), Q*(s, a2), Q*(s, a3), Q*(s, a4))

Comparing the Q* values, we can see that the maximum value is -1. Therefore:

V*(s) = -1

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Answer:

z = 43

Step-by-step explanation:

Answer:

z=43

Step-by-step explanation:

27 + 16 = 43

Hope this helps!

Thus we only take the positive root:x = 27/8 = 3.375Answer: 3.375 feet.

The problem states that a rectangular garden that measures 50 feet wide and 45 feet long is enclosed by a uniform width of x feet paved path. To solve the problem,

we can use the formula of the combined area of the garden and the paved path and equate it to 2646 square feet. The combined area is computed by adding the area of the garden and the area of the paved path.

Garden area:Length of garden = 45 ftWidth of garden = 50 ftArea of garden = Length x Width= 45 x 50= 2250 square feet

Paved path:

If the garden has a uniform width of x feet paved path, then the width of the paved path would be x + 2x + x= 4x. The width is multiplied by 2 because there are two widths surrounding the garden.

Length of paved path = length of garden + 2 (width of paved path)= 45 + 2 (4x)= 8x + 45Width of paved path = width of garden + 2 (width of paved path)= 50 + 2 (4x)= 8x + 50

The area of the paved path is computed by subtracting the area of the garden from the combined area.Area of paved path = Combined area - Garden area2646 square feet

= (8x + 45) (8x + 50) - 2250= 64x² + 760x + 675

We then solve for the value of x by factoring the quadratic equation.2646 square feet = 64x² + 760x + 6752646 - 2646

= 64x² + 760x + 675 - 264664x² + 760x - 1971

= 0(8x - 27) (8x + 73) = 0

The value of x cannot be negative,

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To find the critical points at which profit is maximized given the total revenue TR = 4700 - 302 and total cost TC = 320/10,500, we need to compute the marginal revenue and marginal cost, equate MR = MC to find the optimal quantity Q∗, verify if Q∗ is a relative maximum point, and compute the maximum profit level (π) by evaluating π∗ = 9(π(Q∗)).

Marginal Revenue (MR) is the derivative of the total revenue function with respect to quantity (Q). In this case, MR = dTR/dQ. By taking the derivative of TR = 4700 - 302 with respect to Q, we can find the expression for MR.

Marginal Cost (MC) is the derivative of the total cost function with respect to quantity (Q). In this case, MC = dTC/dQ. By taking the derivative of TC = 320/10,500 with respect to Q, we can find the expression for MC.

To find the optimal quantity Q∗, we equate MR and MC by setting MR = MC and solve for Q. This is because profit is maximized when MR equals MC.

Once we have found Q∗, we need to verify if it is a relative maximum point. This can be done by checking the second derivative of the profit function and determining if it is negative at Q∗. If the second derivative is negative, it confirms that Q∗ is a relative maximum point.

Finally, to compute the maximum profit level (π∗), we evaluate π(Q∗) by substituting Q∗ into the profit function. In this case, we can multiply the value of π(Q∗) by 9 to obtain the maximum profit level (π∗).

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Answer:

70%

Step-by-step explanation:

Percentage is out of 100

35/50 change denominator

multiply both numerator and denominator by 2

70/100= 70%

Answer:

This law simply states that with addition and multiplication of numbers, you can change the grouping of the numbers in the problem and it will not affect the answer. Subtraction and division are NOT associative.

Step-by-step explanation:

Answer:

Step-by-step explanation:

-14.76: Rational

-sqrt(64): 64 is a perfect square so it is rational

1.4444444… rational numbers repeat their decimal digits at one point or another, so this is rational

pi is irrational, so 19pi is irrational.

sqrt(2)*sqrt(2) is rational, but not 2sqrt(2). Irrational.

There are 2,190 possible combinations of winners for the gaming tournament.

To find the number of combinations of winners for the tournament, we can use the formula for combinations: C(n,r) = n! / (r!(n-r)!), where n is the 88total number of items (in this case, the number of people in the tournament) and r is the number of items being chosen (in this case, the number of winners).

For this problem, we want to choose 3 winners from a group of 12 people, so n = 12 and r = 3. Plugging these values into the formula, we get:

C(12,3) = 12! / (3!(12-3)!) = (12 * 11 * 10) / (3 * 2 * 1) = 220

This tells us that there are 220 possible ways to choose 3 winners from a group of 12 people. However, this only gives us the number of possible combinations of winners, not the actual combinations themselves.

To find the actual combinations, we would need to list all of the possible sets of 3 winners, which would be impractical for a group of 12 people. Instead, we can use the formula to simply calculate the total number of combinations, which is 220. Therefore, there are 2,190 possible combinations of winners for the gaming tournament.

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Answer:

1. 14 inches and 21 inches

2.

\( \frac{1}{7} \)

Step-by-step explanation:

1.Since the rectangle has been increased by a factor of 7. Therefore

\(2 \times 7 = 14 \\ 3 \times 7 = 21\)

2. As you have increased it by a factor of 7. To reduce it, multiply by a factor of

\( \frac{1}{7} \)

Answer:

$16

Step-by-step explanation:

We can subtract the amount he spent from the amount he earned to calculate how much Jim had at the end of the day.

The amount earned: $5 for each of four hours of work

So, the amount earned is: 4 hours * $5 per hour = $20

Amount spent: $4

We subtract the amount spent from the amount earned, to find out how much Jim had at the end of the day,

Amount at the end of the day = Amount earned - Amount spent

Amount at the end of the day = $20 - $4

Amount at the end of the day = $16

Therefore, Jim had $16 at the end of the day.