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Katen [24]
4 years ago
8

With 8.4kg of bread, we can feed 15

Mathematics
1 answer:
egoroff_w [7]4 years ago
7 0

Answer: a

Step-by-step explanation:

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A tank holds 50 gal of water, which drains from a leak at the bottom, causing the tank to empty in 20 min. The tank drains faste
kirza4 [7]

Answer:

(a) V(0) = 50 gal, V(20) = 0 gal

(b)At t= 0 the tank is full.

At t=0 the tank is empty

(c)

Time       volume

 0               50 gal

 5                37.5 gal

 10              25 gal

 15             12.5 gal

20                0 gal

(d)

Net change of volume = 50 gal

Step-by-step explanation:

Given that the capacity of the tank is 50 gal.

Torricelli's Law gives the volume of water remaining in the tank after t minutes as

V(t)=50(1-\frac{t}{20})^2

(a)

To find V(0), we put t = 0 in the above equation

V(0)=50(1-\frac{0}{20})^2

        =50(1-0)^2

        = 50 gal

To find V(20), we put t =2 0 in the above equation

V(20)=50(1-\frac{20}{20})^2

        =50(1-1)^2

        = 0 gal

(b)

At t= 0 the tank is full.

At t=0 the tank is empty.

(c)

Time                                          V(t)

  0                                  50(1-\frac{0}{20})^2=50 \ gal

  5                                  50(1-\frac{5}{20})^2=37.5 \ gal

 10                                  50(1-\frac{10}{20})^2=25 \ gal

 15                                 50(1-\frac{15}{20})^2=12.5 \ gal

 20                                50(1-\frac{20}{20})^2=0

(d)

Net change of volume = V(0) -V(20)

                                     =(50-0) gal

                                    = 50 gal

3 0
3 years ago
Un prisma cuadrangular regular tiene 4 m de arista de la base y 6m de altura Calcula el area y el volumen
mario62 [17]

Answer:

El área y volumen del prisma cuadrangular mencionado son respectivamente:

  • <em>Área =</em> 16m^{2}
  • <em>Volumen =</em> 96m^{3}

Step-by-step explanation:

Para solucionar este ejercicio debes recordar que un prisma cuadrangular tiene como base y como superficie cuadrados, por lo tanto, para calcular el área de dicho cuadrado puedes utilizar la siguiente fórmula:

  • <em>Área de un cuadrado = </em>arista^{2}

Ya que el ejercicio nos da el valor de la arista (4 metros), podemos reemplazarla en la ecuación y calcular:

  • Área de un cuadrado = (4m)^{2}
  • Área de un cuadrado = 16m^{2}

Por último, para calcular el volumen debes multiplicar el área superficial, el área del cuadrado calculado, por la altura del prisma, cuyo valor dentro del enunciado es de 6 metros, de esta forma:

  • <em>Volumen de un prisma cuadrangular = área superficial * altura</em>
  • Volumen de un prisma cuadrangular = 16m^{2} * 6 m
  • Volumen de un prisma cuadrangular = 96m^{3}

Como puedes ver tras los cálculos, <u><em>el área superficial del prisma es de </em></u>16m^{2}<u><em> y su volumen es </em></u>96m^{3}.

7 0
3 years ago
Jacob took a total of 12 quizzes over the course of 3 weeks.
Luden [163]
4 weeks because he takes 4 every week
3 0
3 years ago
This is for geometry and i keep getting it wrong​
vova2212 [387]

Step-by-step explanation:

As < A and < B are vertical angles so

<A = < B

5x + 12 = 6x - 11

6x - 5x = 12 + 11

x = 23

Hope it will help :)❤

7 0
3 years ago
Read 2 more answers
15 acres decreased by 80% <br> Find the new amount
Savatey [412]
3 acres would be the new amount
8 0
3 years ago
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