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puteri
1 month ago
7

A region R in the xy-plane is given. Find equations for a transformation T that maps a rectangular region S in the uv-plane onto

R, where the sides of S are parallel to the u- and v- axes. (Let u play the role of r and v the role of θ. Enter your answers as a comma-separated list of equations.) R lies between the circles x2 + y2 = 1 and x2 + y2 = 7 in the first quadrant
Mathematics
1 answer:
babunello [11.8K]1 month ago
6 0
X(u, v) = (2(v - c) / (d - c) + 1)cos(pi * (u - a) / (2b - 2a))
y(u, v) = (2(v - c) / (d - c) + 1)sin(pi * (u - a) / (2b - 2a))

As v goes from c to d, the term 2(v - c) / (d - c) + 1 will vary from 1 to 3, which perfectly defines the radius range. Simultaneously, as u varies from a to b, pi * (u - a) / (2b - 2a) varies from 0 to pi/2, ideal for the angle. This maps the rectangle to R.
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A cone-shaped water cup has a height of 3.3 inches and a diameter of 2.7 inches. One fluid ounce is equivalent to 1.8 cubic inch
lawyer [12517]
The capacity is approximately 3.5 fluid ounces. In order to determine this, we need to compute the volume of a cone-shaped cup. The formula for the volume of a cone is: 1/3 * π * r^2 * h, where r equals the diameter divided by 2, which gives 1.35 inches, and h equals 3.3 inches. After substituting these values, we find the volume to be V = 1/3 * 3.14 * 1.35^2 * 3.3 = 6.3 cubic inches. To convert cubic inches to fluid ounces, we use the relationship that 1 fluid ounce is equal to 1.8 cubic inches. Therefore, x fluid ounces equal to 6.3 cubic inches leads to x = 6.3 / 1.8, which results in 3.5 fluid ounces.
8 0
2 months ago
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What are the solutions of the equation x4 + 6x2 + 5 = 0? Use u substitution to solve.
tester [12383]

The solutions to the equation are x=\pm i, x=\pm \sqrt{5}i

Explanation:

Given the equation x^{4}+6 x^{2}+5=0

, we aim to find the solutions of the equation.

Let us use x^{2} =u and x^4=u^2

Thus, the equation transforms into

u^{2}+6 u+5=0

Factoring the equation results in:

(u+1)(u+5)=0

      u=-1, u=-5

Inserting back x^{2} =u and allows us to solve for x.

Initially, we will substitute u=-1

Consequently, we find;

x^{2} =-1

x=\sqrt{-1}

x=\pm i

Similarly, by substituting u=-5, we derive;

x^{2} =-5

x=\sqrt{-5}

x=\pm \sqrt{5}i

Thus, the solutions to the equation are x=\pm i, x=\pm \sqrt{5}i

6 0
1 month ago
A neighborhood is trying to set up school carpools, but they need to determine the number of students that need to travel to the
AnnZ [12381]

Answer:

The correct selection is 1.

Step-by-step explanation:

The histogram indicates that

In the 5-10 age group, there are 7 students.

In the 11-13 age group, 5 students are represented.

In the 14-18 age category, 4 students are included.

This implies that the ages of 7 students fall within the 5-10 range, 5 students within the 11-13 range, and 4 students within the 14-18 range.

The total count in the dataset is 7+5+4=16

In options 3 and 4, the counts in the datasets are fewer than 16. Hence, options 3 and 4 are invalid.

Option 2 exclusively contains data within the 5-10 range, making it incorrect as well.

In option 1,

Class intervals      elements           frequency

5-10                    5,6,7,8,9,10,10           7

11-13                  11,11,12,12,13            5

14-18                    14,14,15,16              4

Based on the above table, we can determine that data set 1 is represented in the provided histogram.

Thus, the answer is option 1.

4 0
2 months ago
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The general form of the equation of a circle is x2 + y2 + 8x + 22y + 37 = 0. The equation of this circle in standard form is (x
Leona [12618]
Greetings: 
<span>x² + y² + 8x + 22y + 37 = 0
(x² +8x) +(y² +22y) +37 = 0

</span>(x² +8x+4²)-4² +(y² +22y+11²) -11²+37 = 0
(x+4)² +(y+11)²-16-121+37 =0

(x+4)² +(y+11)² =10²...(<span>standard form )
</span><span>The circle's center is located at (-4, -11) and has a radius of 10</span>
3 0
2 months ago
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