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Alekssandra [29.7K]
3 years ago
15

Help me pretty pls:((

Mathematics
2 answers:
a_sh-v [17]3 years ago
8 0

Answer:

give me brainllest if right

1123.2

Step-by-step explanation:

eimsori [14]3 years ago
5 0
Surface area is 1123 sq ft
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A quantity with an initial value of 670 decays continuously at a rate of 25% per hour.
AysviL [449]

Answer:

89.43

Step-by-step explanation:

a = 670 * (1 * .25)^7

a = 670 * (.75)^7

a = 89.43

4 0
3 years ago
Write the expression 17 4/3 using radicals :)
bixtya [17]
Convert to radical form using the formula
a
x
n
=
n
√
a
x
a
x
n
=
a
x
n
.
Exact Form:
3
√
17
4
17
4
3
Decimal Form:
43.71178704
I’m so sorry it won’t let me type it right on my phone but hope this helps
6 0
3 years ago
Use f(x) = 1)2 and f^-1(x) = 2x to solve the problems. a) f(2) b)f^-1(1) c)f^-1(f(2))​
Luden [163]

a) f (2)  = 1

b) f^{-1}(1)=2

c) f^{-1}(f(2))=2

<u>Step-by-step explanation:</u>

f^{-1} - Indicates that we have to find the inverse of the function

Given data:

f(x)=\left(\frac{1}{2}\right) x --------> eq.1

f^{-1}(x)=2 x ---------> eq.2

To find f(2), f^{-1}(1), f^{-1}(f(2))

Case a)

Now, substitute x = 2 in the equation 1 to find f (2)

 f(2)=\left(\frac{1}{2}\right) \times 2=1

Case b)

Now, substitute x = 1 in the equation 2 to find  f^{-1}(1)

  f^{-1}(1)=2(1)=2

Case c)

In general,

    f^{-1}(f(x))=f\left(f^{-1}(x)\right)=x

Thereby,

   f^{-1}(f(2))=2 \text { where } x=2

5 0
3 years ago
Find the area of a circle with a circumference of 50.24
Murljashka [212]

Answer:

200.96

Step-by-step explanation:

The circumference is

C = 2*pi*r

50.24 = 2 * 3.14 (r)

50.24 = 6.28 r

Divide each side by 6.28

50.24/6.28 = r

8 =r

We want to find the area

A = pi r^2

A = 3.14 (8)^2

A =200.96

4 0
4 years ago
Ecuación de la hipérbola con centro en (0;0), focos en abrir paréntesis 0 coma espacio menos raíz cuadrada de 28 cerrar paréntes
yaroslaw [1]

Answer:

\frac{y^{2}}{25}-\frac{x^{2}}{3}=1

Step-by-step explanation:

Para resolver este problema debemos tomar en cuenta los datos que nos dan y la ecuación de una hipérbola. Comencemos con los datos:

centro: (0,0)

focos: (0,-\sqrt{28}),(0,\sqrt{28})

eje conjugado = 2\sqrt{3}

por los focos podemos ver que la hipérbola se dirige hacia el eje y, por lo que debemos tomar la siguiente forma de la ecuación de la parábola:

\frac{y^{2}}{a^{2}}+\frac{x^{2}}{b^{2}}=1

de los focos podemos obtener que:

c=\sqrt{28}

y del eje conjugado podemos saber que al dividir la longitud del eje conjugado dentro de 2 obtenemos b, así que:

b=\sqrt{3}

podemos utilizar la siguiente fórmula para obtener a:

c^{2}-a^{2}=b^{2}

si despejamos a en la ecuación obtenemos lo siguiente:

a=\sqrt{c^{2}-b^{2}}

ahora podemos sustituir los valores:

a=\sqrt{(\sqrt{28})^{2}-(\sqrt{3})^{2}}

a=\sqrt{28-3}

a=\sqrt{25}

a=5

así que media vez conozcamos a, podemos sustituir los datos en la ecuación de la hipérbola así que obtenemos lo siguiente:

\frac{y^{2}}{a^{2}}+\frac{x^{2}}{b^{2}}=1

\frac{y^{2}}{(5)^{2}}+\frac{x^{2}}{(\sqrt{3})^{2}}=1

\frac{y^{2}}{25}+\frac{x^{2}}{3}=1

si graficamos la hipérbola, queda como en el documento adjunto.

7 0
3 years ago
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