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3 years ago

13

Of the first 100 customers to walk into a grocery store, 9 bought flowers. What is that percent of the customers that bought flo

wers?

2 answers:

klasskru [66]3 years ago

7 0

9% of people because 9 of them brought flowers, and 9/100 is equal to 0.09.

Naya [18.7K]3 years ago

4 0

percent means out of 100

9/100 = 9 percent

9% bought flowers

You might be interested in

What is the z-score of a newborn who weighs 4,000 g?.

vagabundo [1.1K]

The z-score of the considered newborn having 4,000 g weight is $\dfrac{4000 - \mu}{\sigma}$

<h3>How to get the z scores?</h3>

If we've got a normal distribution, then we can convert it to standard normal distribution and its values will give us the z score.

If we have

$X \sim N(\mu, \sigma)$

(X is following normal distribution with mean $\mu$ and standard deviation $\sigma$ )

then it can be converted to standard normal distribution as

$Z = \dfrac{X - \mu}{\sigma}, \\\\Z \sim N(0,1)$

(Know the fact that in continuous distribution, probability of a single point is 0, so we can write

$P(Z \leq z) = P(Z < z) )$

Also, know that if we look for Z = z in z tables, the p value we get is

$P(Z \leq z) = \rm p \: value$

For the considered case, the statement in the problem is missing the mean weight of the newborn and standard deviation of the data set of weights of newborn.

Thus, for them, we can consider variables in place of their actual values.

Let we have:

X = weights of newborns for some considered system (in grams)
$\mu$ = mean weight of newborns (in grams)
$\sigma$ = standard deviation of the data set of weights of newborns

Then, the z-score for X = 4000 is

$z = \dfrac{x - \mu}{\sigma} = \dfrac{4000 - \mu}{\sigma}$

Thus, the z-score of the considered newborn having 4,000 g weight is $\dfrac{4000 - \mu}{\sigma}$

Learn more about z-scores here:

brainly.com/question/13299273

3 0

2 years ago

What are the roots of the equation 9x^2 + 54x +82 = 0 in simplest a + bi form?

s344n2d4d5 [400]

Answer:

The roots are

<h3> $x = - 3 + \frac{1}{3} i \: \: \: or \: \: \: x = - 3 - \frac{1}{3} i \\$ </h3>

Step-by-step explanation:

9x² + 54x + 82 = 0

Using the quadratic formula

That's

<h3> $x = \frac{ - b\pm \sqrt{ {b}^{2} - 4ac} }{2a}$ </h3>

From the question

a = 9 , b = 54 , c = 82

Substitute the values into the above formula and solve

That's

<h3> $x = \frac{ - 54\pm \sqrt{ {54}^{2} - 4(9)(82)} }{2(9)} \\ x = \frac{ - 54\pm \sqrt{2916 - 2952} }{18} \\ x = \frac{ - 54\pm \sqrt{ - 36} }{18} \\ x = \frac{ - 54\pm 6i}{18}$ </h3>

Separate the real and imaginary parts

That's

<h3> $x = - \frac{54}{18} \pm \frac{6}{18} \: i \\ x = - 3\pm \frac{1}{3} i$ </h3>

We have the final answer as

<h3> $x = - 3 + \frac{1}{3} i \: \: \: or \: \: \: x = - 3 - \frac{1}{3} i \\$ </h3>

Hope this helps you

5 0

3 years ago

When you encounter a part of a lesson or a math problem that makes you feel stuck or confused, what do you do? How do you help y

11Alexandr11 [23.1K]

Answer:

well when ever i feel stuck i just skip it and come back to it , one thing that makes me feel stuck is doing algebra

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

A recipe calls for 3 cups of flour, 2 cups of sugar and 1 cup of milk. Mason is going to use 7 cups of sugars instead. how much

AlexFokin [52]

Answer:

We need to make a conversion for the new recipe. If the regular recipe calls for 2 cups of Sugar, we can make a conversion for the new recipe.

Step-by-step explanation:

Conversion- 2:7= 1:4 (sugar)

2:7 (sugar)

3: x (flour)

1: y (milk)

X= 8 (flour)

Y= 6 (milk)

NEW RECIPE:

3.5 cups of milk

10.5 cups of flour

7 cups Sugar

We found this by seeing the new recipe adds 5 more cups with the original amount :)

5 0

3 years ago

Read 2 more answers

Dave wants to make a stone walkway.the rectangular walkway is 4 feet wide and 12 feet long. Each 2 foot by 2 foot stone covers a

Ad libitum [116K]

A=L×W
1)Area of walkway
4×12=48

2)Area of stone
2×2=4

3)Divide
48÷4=12

12 stones

5 0

4 years ago