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2 years ago

Who ever answers this will get a year of good luck also 25 points I think

Mathematics

2 answers:

Natalija [7]2 years ago

5 0

the first one is 0.00001

Step-by-step explanation:

its on the screen

sattari [20]2 years ago

5 0

Answer:

Try the underline first

1. 1/7^7 or 10^-6

2. 1/100000 or 10^-5

3. 1/9 or 3^-2

4. 1/512 or 2^-9

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Seven customers enter a clothing store and are observed to determine if they will make a purchase. The store owner states that t

blondinia [14]

Answer: Mean = 5.25

Variance = 1.3125

Standard deviation = 1.456

Step-by-step explanation:

The mean and variance of a binomial distribution with parameters n (number of trials) and p ( the probability of getting success in each trial) is given by :-

$\text{Mean}=np\\\\\text{Variance}=np(1-p)$

Given : The total number of enter a clothing store : n=7

The probability of a customer making a purchase= 0.75

Now,

$\text{Mean}=7(0.75)=5.25\\\\\text{Variance}=7(0.75)(0.25)=1.3125\\\\\Rightarrow\ \text{Standard deviation}=\sqrt{1.3125}=1.14564392374\approx1.1456$

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2 years ago

The cost of three tickets to a movie is at least $20. Select an inequality that represents the cost x (in dollars) of each ticke

SVETLANKA909090 [29]

Answer:

$x\geq \$6.67$

Step-by-step explanation:

Let

x------> the cost of each ticket

we know that

$3x\geq 20$ ----> inequality that represent the situation

solve for x

Divide by 3 both sides

$x\geq 20/3$

$x\geq \$6.67$

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2 years ago

A coin is tossed 10 times resulting in 7 heads and 3 tails. The same coin is tossed 1000 times resulting in 510 heads and 490 ta

KiRa [710]

The answer is C. 50%.

The theoretical probability has nothing to do with the experiments. So, we will forget results of the experiment and think about theoretical probability. A coin has two sides - head and tail. The probability to get head is 1/2 = 0.5 = 50%. This is because if you toss the coin and you get head, head is one probability of two probability in total (head and tail). The same situation is with tail. Tail is .one probability of two probability in total (head and tail).

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2 years ago

The number of wrecks at a certain intersection varies directly as the number of cars that travel through the intersection. If th

Agata [3.3K]

Answer:

D. 245.

Step-by-step explanation:

If you take 1,085 cars and divide it by 31, and then take that answer and multiply it by 7 you get 245.

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2 years ago

Please help ASAP .....

UkoKoshka [18]

It’s b (the imagine is 2 units above the pre-image

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2 years ago