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ser-zykov [4K]
3 years ago
13

During basic training Kevin learns how to read distances on a radar what should Kevin conclude is the distance around largest ci

rcle on the radar screen. Please help :(

Mathematics
1 answer:
uysha [10]3 years ago
7 0

Answer:

H) 63.585

Step-by-step explanation:

Using the graph, we can estimate that the radius is about 4.5 units.

Using the formula of finding area of a circle, pi x radius^2, we can substitude 4.5 as r and 3.14 as pi.

So, 4.5^2 x 3.14 is about 63.585 units.

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El perímetro de un rectángulo es de 72 cm. Halla el área del rectángulo si su largo es el 25% más grande que su ancho
maxonik [38]

Answer:

Las dimensiones del rectángulo son:

ancho = 16 cm

largo = 20 cm

Step-by-step explanation:

Consideración:

La formula del perímetro de un rectángulo es:

perímetro = 2(largo + ancho)

25% más grande = 125% = 125/100 = 1.25

Planteamiento:

2(a+b) = 72

b = 1.25a

a = longitud del ancho

b = longitud del largo

Desarrollo:

de la primer ecuación del planteamiento:

a+b = 72/2

a+b = 36

b = 36 - a        Ec. 3

Igualando la segunda ecuación del planteamiento con la Ec. 3:

1.25a = 36 - a

1.25a + a = 36

2.25 a = 36

a = 36/2.25

a = 16

de la Ec. 3:

b = 36 - a

b = 36 - 16

b = 20

Comprobación:

de la primera ecuación del planteamiento:

2(a+b) = 72

2(16+20) = 72

2*36 = 72

4 0
2 years ago
The vertices of a hyperbola are located at (3, −6) and (3, 6). The foci of the same hyperbola are located at (3,−10) and (3, 10)
lesya [120]

Answer:

The answer is A

Step-by-step explanation:

Cuz maf

5 0
4 years ago
Assume that all​ grade-point averages are to be standardized on a scale between 0 and 4. How many​ grade-point averages must be
guapka [62]

Answer:

a) The required sample size  n= 55011,57025

b) The sample size is not practical, because that size is extremely large and   would be very costly to collect, normally the size have to be significant but no to large to avoid cost unnecessary

Step-by-step explanation:

Range

σ = \frac{4-0}{4} = 1

E = 0,011 \\c= 99 %\\⇒ 0,99

Sample size can be determinate using equation:

n=(\frac{Z_{\alpha /2 * σ} }{E})^{2}

Using confidence level desired 99% Z_{\alpha /2} = 2,58

Table used :

<em>Confidence         Z_{\alpha/2 }</em>

<em>         90 %                    1,60</em>

<em>         95 %                    1,96</em>

<em>        </em><em> 99 %                    2,58</em>

<em>        99,9 %                  3,291</em>

So replacing:

n=(\frac{2,58 * 1 }{0,011})^{2}

n= 234,5454545^{2} \\n=55011,57025

6 0
4 years ago
Read 2 more answers
What multiplies to get 14 and adds to get -9
____ [38]
Hi. I  begin by finding the positive factors of 14. They are: 1 x 14 and 2 x 7. None of those can be added to yield a negative number, so let's now instead consider their negatives: -1 x -14 and -2 x -7. Does either of these pairs, when added, yield -9? Yes: -2 and -7.

To be clear: -2 x -7 = 14; and -2 + -7 = -9.

So the answer is -2 and -7. 
7 0
4 years ago
Which function has a vertex at the origin?
Crank

Answer:

B) f(x)=x(x-4)

Step-by-step explanation:

To find the function which has vertex at the origin.

Solution:

For a function to have its vertex at origin the function must pass through point (0,0) which means f(0)=0.

We will find f(0) for each of the given functions and check if it has vertex at origin.

To find f(0) we will plugin x=0 in the function.

A) f(x)=x+4

f(0)=0+4=4

Vertex is  not at the origin.

B) f(x)=x(x-4)

f(0)=0(0-4)=0  [Any number times zero is = zero]

Vertex is at the origin.

C) f(x)=(x-4)(x+4)

f(0)=(0-4)(0+4)=(-4)(4)=-16

Vertex is  not at the origin.

D) f(x)=2

f(0)=2

Vertex is  not at the origin.

3 0
3 years ago
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