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Nikolay [14]
4 years ago
15

Miranda painted the 4 walls of her rectangular room. Her room measures

Mathematics
1 answer:
4vir4ik [10]4 years ago
6 0

Answer: I think it is 1572 sq feet

Step-by-step explanation:

Lxwxh

14x13x9=1638

Window is 4x4.5=18

Door 1 is8x3=24

Door 2 8x3=24

Since the doors and window are not included in what was painted you need to subtract those totals from the room.

So, 1638-18=1620

1620-48(two doors)=1572 sq feet

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Function D models the depth of a submarine where D(x) is the depth in meters. When the submarine is x miles from its launching l
mixer [17]

The correct option D; models the depth of the submarine.

<h3>Define the term parabola?</h3>
  • Parabola, also known as an open curve or conic section, is formed when a right circular cone and a plane perpendicular to one of the cone's elements cross.

When a submarine is x miles out of its launch place, we need to figure out which table best represents the depth of the submarine using the function d, wherein d(x) is the depth, in meters.

Both x = 5 as well as x = 40 have zeros.

Since it's a parabola,

D(x) = a(x-5)(x-40)

vertex = (22.5, -146)

Thus,

-146 = a(22.5-5)(22.5-40)

a = -146/(22.5-5)(22.5-40)

a = 0.4767

Put value of a in equation.

D(x) = a(x-5)(x-40)

D(x) = 0.4767(x-5)(x-40)

The equation above is quadratic function model.

We can see from the graph that:

(5) and (0), respectively, are points on the graph (40,0).

Consequently, if x = 5 when y = 0, then.

y(min) > -160.

Additionally, the table in option (D) represents the submarine's depth.

To know more about the parabola, here

brainly.com/question/2841375

#SPJ4

The graph of the question with the options are attached.

6 0
2 years ago
How does the number of solutions of a system depend on ranks of the coefficient matrix and the augmented matrix?
fenix001 [56]

Answer:

The number of solutions of a system is given by the number of different variables in the system, this number has to be the same as the number of independent equations. The coefficients and the augmented matrix of the system show these values in a matrix form. A system has a unique solution when the rank of both matrixes and the number o variables in the system are the same.

Step-by-step explanation:

For example, the following system has 2 different variables, x and y.

x+y=1\\x+2y=5

In order to find a unique solution to the system, the number of independent equations and variables in the system must be the same In the previous example, you have 2 independent equations and 2 variables, then the solution of the system is unique.  

The rank of a matrix is the dimension of the vector generated by the columns, in other words, the rank is the number of independent columns of the matrix.  

According to Rouché-Capelli Theorem, a system of equations is inconsistent if the rank of the augmented matrix is greater than the rank of the coefficient matrix. The inconsistency of the system is because you can't find a combination of the variables that will solve the system.

6 0
3 years ago
The volume of a cylinder is 40 f3. Which expression represents the volume of a cone with the same base and height as
riadik2000 [5.3K]

Answer:

Option (3)

Step-by-step explanation:

Volume of the cylinder = 40 ft³

Since, volume of a cylinder is given by the expression,

V = \pi r^{2}h

Here, r = radius of the circular base

h = Height of the cylinder

40 = \pi r^{2}h

h=\frac{40}{\pi r^2} ------(1)

Volume of a cone = \frac{1}{3}\pi r^{2} h

By substituting the value of 'h' from equation (1)

Volume of the cone = \frac{1}{3}\pi r^{2}(\frac{40}{\pi r^{2} } )

                                 = \frac{1}{3}(40) ft³

Therefore, Option (3) will be the correct option.

6 0
3 years ago
I
Ainat [17]

Answer:

a. 5.25cm

b. 374.6 cm^2

Step-by-step explanation:

The radius of the conical cup is half the length of the arc formed

Mathematically, the length of the arc would be;

L = theta/360 * 2 * pi * r

L = 135/360 * 2 * 22/7 * 14 = 33 cm

Now, the arc of this sector will become the base circumference of the circular base of the cone

Thus;

2 * pi * R = 33

2 * 22/7 * R = 33

R = (7 * 33)/44 = 5.25 cm

b. The volume of the cone

Kindly note that the radius of the circle becomes the height of the cone

Mathematically;

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

Kindly note that the radius of the circle will become the slang height of the cone

We can use pythagoras’ theorem to find the height of the cone

Pythagoras theorem states that the square of the hypotenuse equals the sum of the squares of the two other sides

So here, slant height l is the hypotenuse, h and r are the other two sides

So 14^2 -5.25^2 = h^2

h^2 = 168.4375

h = 12.98 cm

Volume is thus ;

1/3 * pi * 5.25^2 * 12.98 = 374.6 cm^3

3 0
4 years ago
There are 20 nickels in one dollar. Write an equation to find the number of nickels n in any number of dollars d
n200080 [17]

5+5+5+5+5+5+5+5+5+5+5+5+5+5+5+5+5+5+5+5

20 nickles

20•5=1.00

4 0
3 years ago
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