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2 years ago

Very urgent.... Anyone please help me.. I need it with explanation!

Mathematics

1 answer:

nexus9112 [7]2 years ago

8 0

Answer:

P(y) = 0.005y² -10y -1000000
3,200,000

Step-by-step explanation:

a) Profit is the difference between revenue and cost.

P(y) = R(y) -C(y)

P(y) = (0.005y² +10y) -(20y +1000000) . . . . use the functions for revenue and cost

P(y) = 0.005y² -10y -1000000 . . . . . profit as a function of y

___

b) Evaluating this function for y=30,000, we get ...

P(30000) = 0.005(30000)² -10(30000) -1000000

= 3,200,000

The company will have a profit of 3,200,000 from the sale of 30,000 cars.

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A closed can, in a shape of a circular, is to contain 500cm^3 of liquid when full. The cylinder, radius r cm and height h cm, is

Gemiola [76]

To express the height as a function of the volume and the radius, we are going to use the volume formula for a cylinder: $V= \pi r^2h$
where
$V$ is the volume
$r$ is the radius
$h$ is the height

We know for our problem that the cylindrical can is to contain 500cm^3 when full, so the volume of our cylinder is 500cm^3. In other words: $V=500cm^3$ . We also know that the radius is r cm and height is h cm, so $r=rcm$ and $h=hcm$ . Lets replace the values in our formula:
$V= \pi r^2h$
$500cm^3= \pi (rcm^2)(hcm)$
$500cm^3=h \pi r^2cm^3$
$h= \frac{500cm^3}{ \pi r^2cm^3}$
$h= \frac{500}{ \pi r^2}$

Next, we are going to use the formula for the area of a cylinder: $A=2 \pi rh+2 \pi r^2$
where
$A$ is the area
$r$ is the radius
$h$ is the height

We know from our previous calculation that $h= \frac{500}{ \pi r^2}$ , so lets replace that value in our area formula:
$A=2 \pi rh+2 \pi r^2$
$A=2 \pi r(\frac{500}{ \pi r^2})+2 \pi r^2$
$A= \frac{1000}{r} +2 \pi r^2$
By the commutative property of addition, we can conclude that:
$A=2 \pi r^2+\frac{1000}{r}$

7 0

2 years ago

a bean plant was 1.5 m high one week ago. In 7 days it grew 15 cm . find the current height of the bean plant

natali 33 [55]

the answer is 16.5cm

just add 15 +1.5 and you get 16.5

8 0

2 years ago

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CUALES SON LOS GRADOS PARA HACER UNA GRAFICA DE PASTEL, CON LOS SIGUIENTES PORCENTAJES( 20%,50%,10%)

svlad2 [7]

Answer:

Lo primero que debemos saber, es que la gráfica de pastel nos permite dividir a una población, la cual sería el 100%, en porcentajes menores que representan algo.

En este caso tenemos los porcentajes 20%, 50%, 10% (notar que no suman 100%, entonces nos falta algún porcentaje)

Bueno, como sabemos el gráfico (el cual es un círculo) representa el 100%.

Y en un círculo, tenemos un ángulo de 360°

Entonces comenzamos con la equivalencia:

360° = 100%

Entonces, ¿a que grado corresponde el 50%? Planteamos la ecuación:

x = 50%

Si tomamos el cociente entre las ecuaciones:

x = 50% y 360° = 100%

obtenemos:

x/360° = 50%/100%

resolviendo para x, obtenemos:

x = (50%/100%)*360° = 0.5*360° = 180°

Para los otros porcentajes hacemos lo mismo.

Para el de 20% tenemos:

y = 20%

planteamos la ecuación:

y/360° = 20%/100%

y = 0.2*360° = 72°

Finalmente, para el de 10% tendremos:

z = 10%

planteando la ecuación como antes:

z/360° = 10%/100%

z = 0.1*360 = 36°

Asi, hemos encontrado los grados correspondientes para cada porcentaje.

8 0

2 years ago

Thanks, & yes how did you get that

soldier1979 [14.2K]

Hello Vmcdowell43

The word Thanks is a shorter way of saying Thank you. Many people use it because it is easier.

The word yes is a simple way to agree with something.

Hope that helps!
-Chris

6 0

2 years ago

PLEASE HELP ME I BEG YOU!!

ivann1987 [24]

1) false

2)true

3)-1.346

4)x=−5x=-5

5)x=3

6)x =~ 3.91

7) x = 162.69

hope I helped :)

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2 years ago

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