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4 years ago

11

The class has 30 boxes of pencils each package each package has 10 pencils the class needs 600 pencils how many more boxes does

the class need

1 answer:

serg [7]4 years ago

7 0

The class needs 40 more boxes , I don’t know why they need 600 pencils but they do

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What is the constant of proportionality in y=0.41x

Monica [59]

$y=0.41x\to\dfrac{y}{x}=0.41\\\\\text{the constant of proportionality is}\ 0.41.$

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4 years ago

A clothing store is tracking how much money adults are spending on clothes each month from their only store. Which description r

den301095 [7]

A clothing store is tracking, adults who are spending on clothes each month from their only store then the adults who buy any clothes consider as population of the store.

Adults who buy any clothes represents a population, who are spending money on clothes each month from their only store.

As others adults who buy their children’s clothes does not include them selves, while buying clothes.

Adults who are not married will buy clothes buy them selves.

So, we cannot consider as population of the store.

Adults who are in college will not buy adults clothes, a teenagers.

So, they are not consider as population of the store.

Therefore,

Adults who buy any clothes consider as population of the store.

To learn more about information visit Population :

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1 year ago

The scores on a Psychology exam were normally distributed with a mean of 67 and a standard deviation of 8. Create a normal distr

Trava [24]

Answer:

(a) The percentage of the scores were less than 59% is 16%.

(b) The percentage of the scores were over 83% is 2%.

(c) The number of students who received a score over 75% is 26.

Step-by-step explanation:

Let the random variable <em>X</em> represent the scores on a Psychology exam.

The random variable <em>X</em> follows a Normal distribution with mean, <em>μ</em> = 67 and standard deviation, <em>σ</em> = 8.

Assume that the maximum score is 100.

(a)

Compute the probability of the scores that were less than 59% as follows:

$P(X$

$=P(Z$

*Use a <em>z</em>-table.

Thus, the percentage of the scores were less than 59% is 16%.

(b)

Compute the probability of the scores that were over 83% as follows:

$P(X>83)=P(\frac{X-\mu}{\sigma}>\frac{83-67}{8})$

$=P(Z>2)\\\\=1-P(Z$

*Use a <em>z</em>-table.

Thus, the percentage of the scores were over 83% is 2%.

(c)

It is provided <em>n</em> = 160 students took the exam.

Compute the probability of the scores that were over 75% as follows:

$P(X>75)=P(\frac{X-\mu}{\sigma}>\frac{75-67}{8})$

$=P(Z>1)\\\\=1-P(Z$

The percentage of students who received a score over 75% is 16%.

Compute the number of students who received a score over 75% as follows:

$\text{Number of Students}=0.16\times 160=25.6\approx 26$

Thus, the number of students who received a score over 75% is 26.

5 0

4 years ago

The sum of 14 and twice a number is 7 less than 6 times a number. What is the number?

Kamila [148]

X = the number

14 + 2x = 6x - 7
21 + 2x = 6x
21 = 4x
5.25 = x

The number is 5.25.

8 0

4 years ago

Assume that the probability that a baseball player will get a hit in any one at bat is 0.250. What is the probability that he wi

Yanka [14]

Answer: 0.0791

Step-by-step explanation:

Given : The probability that a baseball player will get a hit in any one at bat is 0.250.

Let x be the first hit.

According to the geometric probability , the probability that x (th) trial is the first success = $P(X=x)=(1-p)^{x-1}p$ , where p is the probability of getting success in each trial.

As per given p= 0.250

Then, the probability that he will get his first hit on his 5th at bat will be :

$P(X=x)=(1-0.25)^{5-1}(0.25)\\\\=(0.75)^4(0.25)\\\\=0.0791015625\approx0.0791$

Hence, the probability that he will get his first hit on his 5th at bat is 0.0791 .

7 0

3 years ago