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3 years ago

Use the permutation formula to solve a problem when n = 8 and r = 4.

Mathematics

2 answers:

Feliz [49]3 years ago

8 0

Answer:

1680

Step-by-step explanation:

(,)=(8,4)

$=\frac{8!}{(8-4)!}$

=1,680

olganol [36]3 years ago

7 0

The answer is B which is 1,689

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Each serving has 9 grams of chocolate. how many grams of chocolate are in 8 servings of hot cocoa

SCORPION-xisa [38]

72 grams because 8 servings * 9 grams equals 72

6 0

3 years ago

(25+,-,* 4) +,-,*3 +,-,*7=9

EleoNora [17]

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3 years ago

foot locker uses sales per square foot as a measure of store productivity last year the mean annual sales per square foot was 39

lord [1]

Answer:

There is a 82% probability that th esample mean annual sales per square foot is at least $384.

Step-by-step explanation:

We have a population with mean 390 and standard deviation 45.83.

Samples of size n=49 are taken.

The parameters of the sampling distribution are:

$\mu_s=\mu=390\\\\ \sigma_s=\dfrac{\sigma}{\sqrt{n}}=\dfrac{45.83}{\sqrt{49}}=\dfrac{45.83}{7}=6.547$

First, we have to calculate the z-score that satisfies:

$P(z>z^*)=0.82$

This z-score, looked up in a standard normal distribution table, is z=-0.915.

Then, we can calculate the sample mean as:

$M=\mu_s+z\cdot\sigma_s=390+(-0.915)\cdot 6.547=390-6=384$

There is a 82% probability that th esample mean annual sales per square foot is at least $384.

3 0

3 years ago

Find the absolute Value of -0.99

Leona [35]

Answer:

0.99

Step-by-step explanation:

That's the distance from 0.

7 0

3 years ago

Read 2 more answers

Find the TWO integers whos product is -12 and whose sum is 1

konstantin123 [22]

Answer:

$\rm Numbers = 4 \ and \ -3.$

Step-by-step explanation:

Given :-

The sum of two numbers is 1 .
The product of the nos . is 12 .

And we need to find out the numbers. So let us take ,

First number be x
Second number be 1-x .

According to first condition :-

$\rm\implies 1st \ number * 2nd \ number= -12\\\\\rm\implies x(1-x)=-12\\\\\rm\implies x - x^2=-12\\\\\rm\implies x^2-x-12=0\\\\\rm\implies x^2-4x+3x-12=0\\\\\rm\implies x(x-4)+3(x-4)=0\\\\\rm\implies (x-4)(x+3)=0\\\\\rm\implies\boxed{\red{\rm x = 4 , -3 }}$

Hence the numbers are 4 and -3 

3 0

3 years ago