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3 years ago

I really need help. Please explain and show me how to do this. Thank you so much

Mathematics

1 answer:

Romashka [77]3 years ago

5 0

The volume of a cone is V=(1/3)•pi•r^2•h
now you plug in your given values
V=(1/3)•pi•2^2•5
the final answer is (20/3)pi

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suppose we want to choose 6 letters without replacement from 13 distinct letters. A) how many ways can this be done if order doe

kiruha [24]

Answer: A) 1716 B) 1235520

Step-by-step explanation:

If order doesn't matter , then we use combinations, where the number of combinations of selecting r things from n is given by :-

$^nC_r=\dfrac{n!}{r!(n-r)!}$

If order matters , then we use permutations, where the number of permutations of selecting r things from n is given by :-

$^nP_r=\dfrac{n!}{(n-r)!}$

Given, Total distinct letters = 13

To choose = 6 letters

A) Number of ways to choose (if order does not matter)= $^{13}C_6$

$=\dfrac{13!}{6!7!}=\dfrac{13\times12\times11\times10\times9\times8\times7!}{(720)\times 7!}\\\\= $$1716$

B) Number of ways to choose (if order matters)= $^{13}P_6$

$=\dfrac{13!}{7!}=\dfrac{13\times12\times11\times10\times9\times8\times7!} 7!}\\\\= $$1235520$

Hence, A) 1716 B) 1235520

5 0

4 years ago

Write the following expression or equation in words. x - 2y

WITCHER [35]

X minus two times Y.

5 0

3 years ago

Step by step instructions please

ioda

I hope this helps you...

4 0

4 years ago

No Solutions 3x+9+4x+x

noname [10]

Answer:

8x+9

Step-by-step explanation:

You need to group your like terms : (3x+4x+x)+9 = 8x+9

Hope this helps! Just always remember to combine like terms first, and then you will get your soltution faster and easier.

7 0

2 years ago

Four friends participated in a speed-typing contest. Who has the slowest typing speed? Georgie: 320 words in 8 minutes Tara: 403

dsp73

Frank has the lowest typing speed, at only 39.5 words per minute.

Tara has 40.3 wpm
Georgie has 40 wpm
Lupe had 40.5 wpm

4 0

3 years ago