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4 years ago

HELPP I’m going to fail and I don’t understand this

Mathematics

2 answers:

Veseljchak [2.6K]4 years ago

5 0

Hello!

To find the percentage you divide the two numbers and then multiply by 100 to get the percentage.

Store 1
5/8=0.625
0.625=62.5%

Store 2
13/22≈0.59
0.59=59%

Store 3
22/30≈0.73
0.73=73%

Store 4
12/25=0.48
0.48=48%

As we can see from our percentages, 73% is the greatest. Therefore Store 3 is the correct answer.

I hope this helps!

Drupady [299]4 years ago

3 0

The answer would be store 4...

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May anyone help on these problem

NeX [460]

Okay, first thing first... you are amazing

second, number 7 is 5/2

number 10 is 3/6

hope this helps and have a w-o-n-d-e-r-f-u-l d-a-y :)

and merry christmas

6 0

3 years ago

A website manager has noticed that during the evening hours, about 3.23.2 people per minute check out from their shopping cart

aleksandrvk [35]

Answer:

1. c. Poisson

2. 0.9592 = 95.92% probability that in any one minute at least one purchase is made.

3. 0.0017 = 0.17% probability that no one makes a purchase in the next 2 minutes.

Step-by-step explanation:

We have only the mean, which means that the Poisson distribution is used to solve this question, and thus the answer to question 1 is given by option c.

Poisson distribution:

In a Poisson distribution, the probability that X represents the number of successes of a random variable is given by the following formula:

$P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}$

In which

x is the number of sucesses

e = 2.71828 is the Euler number

$\mu$ is the mean in the given interval.

Mean of 3.2 minutes:

This means that $\mu = 3.2n$ , in which n is the number of minutes.

2. What is the probability that in any one minute at least one purchase is made?

$n = 1$ , so $\mu = 3.2$ .

This probability is:

$P(X \geq 1) = 1 - P(X = 0)$

In which

$P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}$

$P(X = 0) = \frac{e^{-3.2}*3.2^{0}}{(0)!} = 0.0408$

$P(X \geq 1) = 1 - P(X = 0) = 1 - 0.0408 = 0.9592$

0.9592 = 95.92% probability that in any one minute at least one purchase is made.

3. What is the probability that no one makes a purchase in the next 2 minutes?

2 minutes, so $n = 2, \mu = 3.2(2) = 6.4$

This probability is P(X = 0). So

$P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}$

$P(X = 0) = \frac{e^{-6.4}*6.4^{0}}{(0)!} = 0.0017$

0.0017 = 0.17% probability that no one makes a purchase in the next 2 minutes.

7 0

3 years ago

Global temperatures are generally increasing. The average temp for Orlando is 73 degrees Fahrenheit. If temps are rising at an a

Nezavi [6.7K]

The multiplier is 1 + (percentage increase) = 1.0013.

_____
It make no sense to talk about percentage changes in temperature. Just sayin'.

6 0

4 years ago

Devin made 30 custom t-shirts to sell.He will donate 1/8 0f his total sales to a local charity. He sold all 30 t-shirts for $18

V125BC [204]

Answer:

Devin will donate <u>$67.5</u> to charity.

Step-by-step explanation:

Given:

Devin made 30 custom t-shirts to sell.

He will donate 1/8 0f his total sales to a local charity.

He sold all 30 t-shirts for $18 each.

Now, to find the amount Devin donate to charity.

Total number of t-shirts = 30.

Each t-shirts sold at = $18.

So, total amount of 30 t-shirts sold:

$30\times 18$

$=\$540.$

As, Devin will donate $\frac{1}{8}$ of his total sales to a local charity.

Now, to get the amount he will donate to charity:

$\frac{1}{8} \ of\ \$540\\\\=\frac{1}{8} \times 540\\\\=\frac{540}{8}\\\\=\$67.5.$

Therefore, Devin will donate $67.5 to charity.

5 0

4 years ago

A ball is launched into the sky at 54. 4 ft./s from a 268.8 m tall building. The equation for the ball’s height, h, at time t se

Crank

Answer:

t = 21

Step-by-step explanation:

The ball strikes the groujd when h = 0.

$-3.2t^2 + 54.4t+268.8=0 \\ \\ 32t^2 - 544t-2688=0 \\ \\ t^2 - 17t-84=0 \\ \\ (t-21)(t+4)=0 \\ \\ t=-4, 21$

Since time must be positive, t = 21.

6 0

2 years ago