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3 years ago

Bab needs help please ☹️

Mathematics

1 answer:

zlopas [31]3 years ago

5 0

Answer:the area is 28.27

Step-by-step explanation:

im just that good

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The radius of the base of a cylinder is decreasing at a rate of 121212 kilometers per second. The height of the cylinder is fixe

WARRIOR [948]

Answer:

7536 $km^3/sec$

Step-by-step explanation:

Given that:

Rate of decreasing of radius = 12 km/sec

Height of cylinder is fixed at = 2.5 km

Radius of cylinder = 40 km

To find:

The rate of change of Volume of the cylinder?

Solution:

First of all, let us have a look at the formula for volume of a cylinder.

$Volume = \pi r^2h$

Where $r$ is the radius and

$h$ is the height of cylinder.

As per question statement:

$r$ = 40 km (variable)

$h$ = 2.5 (constant)

$\dfrac{dV}{dt} = \dfrac{d}{dt}\pi r^2h$

As $\pi, h$ are constant:

$\dfrac{dV}{dt} = \pi h\dfrac{d}{dt} r^2\\\Rightarrow \dfrac{dV}{dt} = \pi h\times 2 r\dfrac{dr}{dt} \\$Putting the values:$\\\Rigghtarrow\dfrac{dV}{dt} = 3.14 \times 2.5\times 2 \times 40\times 12 \\\Rigghtarrow\dfrac{dV}{dt} = 7536\ km^3/sec$

4 0

3 years ago

Find the sum 7,388 and 829

FinnZ [79.3K]

8217 I think but I'm not sure

7 0

3 years ago

Read 2 more answers

Ed has 30 sweets. The ratio of red sweets to yellow sweets is 2:3 How

Vesnalui [34]

Answer:

The ratio of red sweets to yellow sweets is 12.

3 0

3 years ago

Read 2 more answers

Write the equation of the line that passes through the points (-4,8) and (-2, -1).

IRINA_888 [86]

Answer:

y=-9/2x-10

Step-by-step explanation:

m=(y2-y1)/(x2-x1)

m=(-1-8)/(-2-(-4))

m=-9/(-2+4)

m=-9/2

y-y1=m(x-x1)

y-8=-9/2(x-(-4))

y-8=-9/2(x+4)

y=-9/2x-36/2+8

y=-9/2x-18+8

y=-9/2x-10

5 0

3 years ago

I need help asap thanks

Sunny_sXe [5.5K]

$V=hb$

$h= \frac V b$

$h = \dfrac{ x^3 - 3x^2 + 5x - 3}{x^2 -2}$

Expressing that as a quotient and remainder,

$h =x - 3 = \dfrac{ 7 x - 9} { x^2 - 2}$

First choice.

7 0

3 years ago