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2 years ago

12

How to know if a problem is permutation or combination?

1 answer:

vredina [299]2 years ago

6 0

If the order matters it is a permutation. For example: if you are selecting 3 people to be on a committee it doesn't matter what order you select them, but if you're selecting three people to be president, vice president, and secretary the order in which you choose them matters the first person being president, the second person being vice president, and the third person be secretary

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four spheres of radius 6cm just fit inside a cylinder calculate the volume inside the cylinder that is empty leave your answers

Alekssandra [29.7K]

Answer:

The volume inside the cylinder is $1152\pi\ cm^3$ .

Step-by-step explanation:

Given : Four spheres of radius 6 cm just fit inside a cylinder.

To find : Calculate the volume inside the cylinder that is empty ?

Solution :

The volume of the cylinder is volume of 4 spheres.

The volume of sphere is $V=\frac{4}{3}\pi r^3$

The radius is 6 cm.

The volume of four spheres is

$V=4\times \frac{4}{3}\times \pi\times (6)^3$

$V=1152\pi\ cm^3$

Therefore, the volume inside the cylinder is $1152\pi\ cm^3$ .

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lilavasa [31]

Answer:

rate of change = -0.32

Step-by-step explanation:

Rate of change = slope,m

$m = \frac{y2 - y1}{x2 - x1} \\ m = \frac{3.6 - 2}{ - 3 - 2} \\ m = \frac{1.6}{ - 5} \\ m = \frac{ - 0.32}{1}$

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Solve the inequality 5(2x + 1) < 10.

ivann1987 [24]

Answer:

A is the answer

Step-by-step explanation:

5(2x+1)<10

10x+5<10

-5 -5

____________

10x<5

—— —-

10 10

———————-

x < 1/2

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Answer:

you are correct

Step-by-step explanation:

you are correct

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3 years ago

Multiple choice question

SpyIntel [72]

Answer is B. 2 hot items and 8 cold items

2(3) + 8(2) = 6 + 16 = 22<25

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