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3 years ago

PLEASEEEE HELP??

Mathematics

1 answer:

lora16 [44]3 years ago

3 0

Is it adding or subtracting

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How do you say 33 091 in word

LekaFEV [45]

Thirty three thousand and ninety one

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4 years ago

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An ice cube is melting, and the lengths of its sides are decreasing at a rate of 0.8 millimeters per minute At what rate is the

julia-pushkina [17]

Answer:

The rate of decrease is: $43.2mm^3/min$

Step-by-step explanation:

Given

$l = 18mm$

$\frac{dl}{dt} = -0.8mm/min$ ---- We used minus because the rate is decreasing

Required

Rate of decrease when: $l = 18mm$

The volume of the cube is:

$V = l^3$

Differentiate

$\frac{dV}{dl} = 3l^2$

Make dV the subject

$dV = 3l^2 \cdot dl$

Divide both sides by dt

$\frac{dV}{dt} = 3l^2 \cdot \frac{dl}{dt}$

Given that: $l = 18mm$ and $\frac{dl}{dt} = -0.8mm/min$

$\frac{dV}{dt} = 3 * (18mm)^2 * (-0.8mm/min)$

$\frac{dV}{dt} = 3 * 18 *-0.8mm^3/min$

$\frac{dV}{dt} = -43.2mm^3/min$

<em>Hence, the rate of decrease is: 43.2mm^3/min</em>

8 0

3 years ago

Find the surface area of the prism. Enter your answer in the box.<br> 12 m<br> 3 m<br> 6 m

yarga [219]

Answer:

Step-by-step explanation:Answer:

l = 3 m

w = 6 m

h = 12 m

d = 13.7477 m

S = 252 m2

V = 216 m3

5 0

3 years ago

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Do not scam or you get reported

Nikitich [7]

Answer:

.62 cents per box

Step-by-step explanation:

Take the total cost and divide by the number of boxes to get the unit cost

4.98 / 8

.6225 per box

It states to round to the nearest cent

.62 cents per box

7 0

3 years ago

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I need to know what this is

ycow [4]

Answer:

$★\:\: \frac{3 {x}^{3} - 18 {x}^{2} + 27x}{2 {x}^{2} + 2x - 12}\:when\:x≠2,\:3 \\ = \frac{3x( {x}^{2} - 6x + 9) }{2( {x}^{2} + x - 6) } \\ = \frac{3x( {(x)}^{2} - 2 \times (3) \times (x) + {(3)}^{2} ) }{2( {x}^{2} + 3x - 2x - 6) } \\ = \frac{3x {(x - 3)}(x - 3) }{2(x(x + 3) - 2(x + 3))} \\ = \boxed{‡ \frac{3x {(x - 3)}^{2} }{2(x + 3)(x - 2)}‡}✓$

<h3><u>3x(x-3)²/2(x+3)(x-2)</u> is the right answer.</h3>

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3 years ago