A number has the digits 1, 9 and 5 to the nearest 100 the number rounds to 600. What is the number?

An icosahedron have 20 faces. So the correct Option is D.  

An icosahedron is a three-dimensional geometric shape known as a polyhedron. It is characterized by having 20 faces, making it an interesting and unique structure in geometry.

An icosahedron is one of the five Platonic solids, which are regular polyhedra with equal faces and angles. To understand why an icosahedron has 20 faces, we can break down its construction.

1. Vertices (V): An icosahedron has 12 vertices. Each vertex is a point where three edges of the polyhedron meet.

2. Edges (E): There are 30 edges in an icosahedron. These are the straight lines connecting the vertices.

3. Faces (F):  Now, to find the number of faces, we can use Euler's formula, which states that for any polyhedron, V - E + F = 2. This formula relates the number of vertices, edges, and faces of a convex polyhedron.

  Plugging in the values, we get: 12 (vertices) - 30 (edges) + F (number of faces) = 2

  Solving for F, we get: F = 20

Thus, an icosahedron has 20 faces, represented by 20 flat surfaces, each of which is an equilateral triangle. Each vertex is shared by five triangles, and each edge is shared by two triangles.

The keyword "icosahedron" refers to the specific three-dimensional shape with 20 faces, while "Platonic solids" refers to the family of regular polyhedra with equal faces and angles. Euler's formula is essential for understanding the relationship between vertices, edges, and faces of polyhedra.

To know more about Icosahedron here

https://brainly.com/question/26110693

#SPJ2

Answer: The scale factor is 3

Divide the two volumes (larger over small) to find that (21870pi)/(810pi) = 27. This means that the larger volume is 27 times bigger than the smaller volume.

From here, you apply the cube root to this result to get 3. Note how 3 cubed = 3^3 = 3*3*3 = 27.

The linear scale factor is 3. The larger figure has a radius 3 times larger than its counter part in the smaller cone. The same applies to the heights as well.

Answer:

Step-by-step explanation: by Saturday,, he would have read 25 + 32 +  39 +46 +53 +60 =255 pages. Note the number of pages read increases by 7 each day

Answer:

It was part of an exam that someone recognized apparently. It's for the best, trust me. Maybe its just because it may have been asking for answers, not help.

Step-by-step explanation:

They did that to me and took everything from me! I was ranked expert and it was all gone! My answer wasn't even wrong! I have 83 answered questions and they took it all... FOR NO REASON

I answered someones questioned and they deleted it and gave me warning

Answer:

[tex]x=3.5,y=24[/tex]

Step-by-step explanation:

The smaller triangle joining the midpoints of the bigger right angle triangle will also be a right angle triangle.

Midpoint Theorem-

According to this, the segment joining two sides of a triangle at the midpoints is half the length of the third side.

Applying this,

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

[tex]\Rightarrow 2x=4x-7[/tex]

[tex]\Rightarrow 4x-2x=7[/tex]

[tex]\Rightarrow 2x=7[/tex]

[tex]\Rightarrow x=\dfrac{7}{2}=3.5[/tex]

So, the hypotenuses of the bigger triangle will be,

[tex]=6(3.5)+4=25[/tex]

Applying the mid point theorem, the hypotenuses of the smaller triangle will be,

[tex]=\dfrac{1}{2}\times 25=12.5[/tex]

Applying Pythagoras theorem in the smaller triangle, the leg will be

[tex]=\sqrt{12.5^2-3.5^2}\\\\=\sqrt{156.25-12.25}\\\\=\sqrt{144}\\\\=12[/tex]

Again applying mid point theorem,

[tex]\Rightarrow y=2\times 12=24[/tex]

Answer:

The standard form would be 5x + 6y = 8

Step-by-step explanation:

To find the equation between these two points, start by finding the slope. You can do this using the slope formula.

m(slope) = (y2 - y1)/(x2 - x1)

m = (3 - -2)/(-2 - 4)

m = 5/-6

m = -5/6

Now that we have the slope, we can use that and a point in point-slope form. Once we have that we can solve for the constant and rationalize the denominator for the standard form.

y - y1 = m(x - x1)

y - 3 = -5/6(x + 2)

y - 3 = -5/6x - 5/3

5/6x + y - 3 = -5/3

5/6x + y = 4/3

5x + 6y = 8

Answer: C. [tex]\frac{7}{25}-\frac{24}{25}i[/tex]

Step-by-step explanation:

1. You have the following division:

[tex]\frac{4-3i}{4+3i}[/tex] (As you can see, to find the conjugate of  4-3i you must change the sign between the terms).

2. To solve this division, you must multiply the numerator and the denominator by the conjugate of the denominator, as following:

[tex]=\frac{(4-3i)}{(4+3i)}\frac{(4-3i)}{(4-3i)}=\frac{16-12i-12i+9i^{2}}{16-9i^{2}}[/tex]

3. Keeping on mind that [tex]i^{2}=-1[/tex], you have:

[tex]=\frac{16-12i-12i+9(-1)}{16-9(-1)}[/tex]

4. Simplifying:

[tex]=\frac{7-24i}{25}=\frac{7}{25}-\frac{24}{25}i[/tex]

5. The result is:

[tex]\frac{7}{25}-\frac{24}{25}i[/tex]

The quotient of the complex number 4 - 3i divided by its conjugate is  [tex]\dfrac{7}{25} -\dfrac{24}{25}i[/tex]. And option (C) is correct.

Given data:

The complex number is, 4 - 3i.

To find: The quotient when divided by conjugate of given complex number.

For a given complex number say, a + bi, the conjugate is given as,

a - bi

Then, the conjugate of the given complex number is, 4 + 3i.

Divide the given complex number with its conjugate as,

[tex]=\dfrac{ 4 - 3i}{4 + 3i}\\\\=\dfrac{ 4 - 3i}{4 + 3i} \times \dfrac{4-3i}{4-3i} \\\\=\dfrac{(4-3i)^{2}}{4^{2}-(3i)^{2}}[/tex]

Since, [tex]i^{2} =-1[/tex].

Solving further as,

[tex]=\dfrac{4^{2}+(3i)^{2}-2(4)(3i)}{16-9(-1)} \\\\=\dfrac{16+9(-1)-24)}{25}} \\\\=\dfrac{7}{25} -\dfrac{24}{25}i[/tex]

Thus, we can conclude that the quotient of the complex number 4 - 3i divided by its conjugate is  [tex]\dfrac{7}{25} -\dfrac{24}{25}i[/tex]. And option (C) is correct.

Learn more about the conjugate of complex number here:

https://brainly.com/question/18392150

Answer: C. (x+1) is a factor

Step-by-step explanation:

First we need to factor the polynomial x^2 - x - 2.

It is written in the form ax^2 + bx + c

a = 1

b = -1

c = -2

Since the coefficient in front of x^2 is 1 we can start with (x + _) (x + _).

Now we need to find a pair of numbers that when multiplied together equal -2 (c) and when added together equal -1  (b).

The only pairs of numbers that multiply to make -2 are: -2 and 1, -1 and 2

The pair must also equal -1 when added together.

-1 + 2 = 1

-2 + 1 = -1

Therefore, to fill in the blanks for (x+_)(x+_) we should use -2 and 1.

x^2 - x - 2 factored becomes: (x-2)(x+1)

As you can see, (x+1) is a factor of x^2 - x - 2, so you can select c.

Answer:

21.76 Centimeters

Step-by-step explanation:

Length - 3.2 Cm

Width - 6.8 Cm

Area = Width * Length (Or other way around)

Multiply:

3.2 * 6.8

= 21.76

- I.A -

Answer:

mean: 27

median: 25

mode: 25

Step-by-step explanation:

Mean: 297/11 =27

Median: put the values in order; 22,23,24,25,25,25,28,29,31,32,33. the median is 25

Mode: 25

Final answer:

The mean of the data set is 27, the median is 25, the mode is also 25, and the range is 11.

Explanation:

To find the mean, you add up all the numbers and then divide by the number of values. The median is the middle value when the numbers are in order. The mode is the number that appears the most. The range is the difference between the highest and lowest numbers.

First, let's order the data from least to greatest: 22, 23, 24, 25, 25, 25, 28, 29, 31, 32, 33.

Now, we calculate each:

1.The mean is (22 + 23 + 24 + 25 + 25 + 25 + 28 + 29 + 31 + 32 + 33) / 11 which equals 297 / 11 which equals 27.
2.The median is the middle number, which is 25 because there are five numbers on each side of it in the ordered list.

3.The mode is the number that appears most frequently - that's 25, as it appears three times.

4.To find the range, subtract the smallest number from the largest: 33 - 22 equals 11.

Answer:

domain = real numbers, range = positive real numbers

Step-by-step explanation:

f(x) = a^x

Domain is the set of all real numbers whose values are defined.

Here x is the exponent. There is no restriction for x

So x  can take any value. x  can be positive or negative

Hence, domain is all real numbers.

For range we consider the value of f(x)

For positive x  values , f(x) will be positive

For negative x  values , f(x) will be positive

so , range is positive real numbers

Answer:

Its the 3rd choice.

Step-by-step explanation:

The general form  for this type of parabola is y^ = 4ax where a is the x coordinate of the focus.

So it is y^2 = 4*3 * x

= y^2 = 12 x

or x = 1/12 y^2

Answer:

c. 345 calories

Step-by-step:

We need to create a ratio

There are 230 calories in 4oz

230/4

How many calories are in 6oz

x/6

Let's equate them to solve for x

230/4 = x/6       cross multiply

4x = 1380           isolate x

x = 345

There are 345 calories in 6oz of said icecream

Answer:

1,114 ft

Step-by-step explanation:

Answer:

1.  x=6

2.  y=2

Step-by-step explanation:

If x=5, the line is vertical, so we need a vertical line so that we are parallel.  A vertical line is x= a constant

We can choose the value for x as long as it is not 5, that would make it the same line.  I will choose x=6

If y=-3=5, the line is horizontal, so we need a horizontal line so that we are parallel.  A horizontal line is y= constant

We can choose the value for y as long as it is not -3, that would make it the same line.  I will choose y=2

Answer:

0.34

Step-by-step explanation:

I just used a calculator

Answer:

Mass of one penny = .005 pounds

10 pounds of pennies = 10 / .005 = 2,000 pennies

Step-by-step explanation:

Final answer:

To calculate the number of pennies, divide the total weight of the pennies in the jar (10 pounds) by the weight of one penny (0.005 pounds), resulting in approximately 2000 pennies.

Explanation:

To determine the number of pennies in Ian's jar, we need to use the weight of one penny and the total weight of pennies in the jar. The question states that one penny weighs about 5*10^-3 pounds, which can also be represented as 0.005 pounds.

Next, we divide the total weight of pennies in the jar, which is 10 pounds, by the weight of one penny:

Convert the weight of one penny to pounds: 5*10^-3 pounds.

Divide the total weight of the pennies by the weight of one penny: 10 pounds \/ 0.005 pounds per penny = 2000 pennies.

Hence, there are approximately 2000 pennies in Ian's jar.

Answer:

Value of h(2y+6) = -18y -57

Step-by-step explanation:

Given the function rule:

h(u) = -9u -3                               ......[1]

To find h(2y+6)

Substitute u = 2y + 6 in [1] we get;

h(2y+6) = -9(2y+6) - 3

Using distributive property: [tex]a\cdot (b+c) = a\cdot b + a\cdot c[/tex]

h(2y+6) = - 18y - 54 - 3 = -18y - 57

Therefore, the value of [tex]h(2y+6) = -18y - 57[/tex]

Final answer:

The height of the new cones will be 16.5 inches.

Explanation:

To find the height of the new cones, we can use the formula for the volume of a cone:

V = (1/3)πr^2h

Let's denote the radius of the new cones as r2 and the height of the new cones as h2. We know that the volume of the new cones will be the same as the volume of the existing cones:

(1/3)π(r2)^2h2 = (1/3)π(r1)^2h1

Substituting the given values, r1 = 22 inches (radius of existing cones) and h1 = 66 inches (height of existing cones), we can solve for h2:

(1/3)π(44)^2h2 = (1/3)π(22)^2(66)

Dividing both sides by (1/3)π(44)^2, we get:

h2 = h1(r1/r2)^2

Plugging in the values, h1 = 66 inches and r1 = 22 inches, and r2 = 44 inches, we can calculate:

h2 = 66(22/44)^2

h2 = 66(1/2)^2

h2 = 66(1/4)

h2 = 66/4

h2 = 16.5 inches

Answer:

Marta is (2x)+6 older than Ella.

The three girl's average age is (w)+(w/2)+(w/2-6)/3

Step-by-step explanation:

Marta's Age: w

Felicia's Age: w/2

Ella's Age: (w/2)-6

The age difference between Marta and Elle is Felicia's age plus 6 years. The expression for the average age of the three girls is (2*w - 6) / 3, where w is Marta's age and Felicia's age is half of w.

To solve the problem involving the ages of Elle, Felicia, and Marta, we use algebraic expressions. Marta is w years old.

Part a)

Let's denote Felicia's age as f. Since Elle is 6 years younger than Felicia, Elle's age is f - 6. Given that Marta is twice as old as Felicia, Marta's age, w, is equal to 2f. To find the age difference between Marta and Elle, we subtract Elle's age from Marta's age:

Age difference = w - (f - 6)

Since w = 2f, we can substitute 2f for w:

Age difference = 2f - (f - 6) = 2f - f + 6 = f + 6

Part b)

To find the average age of the three girls, we add their ages and divide by 3:

Average age = (Elle's age + Felicia's age + Marta's age) / 3

Average age = (f - 6 + f + 2f) / 3

Average age = (4f - 6) / 3

Since Marta's age is w and w = 2f, we can substitute 2f for each f in the equation:

Average age = (2*w - 6) / 3

Answer:

3V / (pi*r^2) = h

Step-by-step explanation:

V = 1/3 *pi * r^2 h

We want to solve for h so we need to get it alone

Multiply each side by 3.

3*V =3* 1/3 *pi * r^2 h

3V = pi * r^2 h

Divide each side by pi r^2

3V / (pi*r^2) = pi * r^2 h/ (pi *r^2)

3V / (pi*r^2) = h

Answer:

25 people

Step-by-step explanation: 6 x 5 = 30 30-5 = 25

Answer:

x=36

Step-by-step explanation:

We know the three angles of a triangle add to 180 degrees

x + 65+ 79 = 180

Combine like terms

x+144 = 180

Subtract 144 from each side

x+144-144 = 180-144

x = 36

Answer:

[tex]\text{d.}\quad a_n=-2.25(2)^{n-1}[/tex]

Step-by-step explanation:

The common ratio is given as 2, so the base of any exponential must be 2 (not -2 or 2.25). The 4th term is negative, so the initial value must be negative (since the multiplying factor is positive). The only selection matching these requirements is d.

You know the general term is ...

... an = a1·r^(n-1)

so the 4th term is

... -18 = a1·2^(4-1) = 8·a1

Then the first term is ...

... a1 = -18/8 = -2.25 . . . . . confirms our choice of answer d.