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Goryan [66]
3 years ago
8

A bag contains 5 white marbles, 3 yellow marbles, and 2 black marbles. If you pull out a marble without replacing it, what is th

e probability of Choosing a white marble and then another white marble
Mathematics
1 answer:
myrzilka [38]3 years ago
6 0

Answer:

four of nine or a 44.444444444444% chance

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There are 75 students performing in the holiday concert. Of the students, 30 are boys. What percent of the students are boys?
viva [34]

Answer:

Total students = 75

Boys = 30

<h3>Percentage</h3>

\sf \frac{30}{75}  \times 100\% \\   \sf=  \frac{10}{25}  \times 100\% \\  \sf =  \boxed{ \bold{ \red{40\%}}}

Hope it helps!

8 0
3 years ago
A researcher wants to know how professional athletes in her city feel about safety measures. She obtains a list of 952 professio
mojhsa [17]

Answer:

For this case the population represent all the professional athletes in the researcher city and we can assume that the sample size for tis population is N =982 and represent all the individuals of interest for the study and the parameter of interest is the proportion of athletes who believe that the enforcement of safety measures needs to be completely overhauled p.

In order to estimate te parameters of the population the researcher select a sample of 400 professional athletes and just 86 of them returns the questionnaire sent. So then the real sample is the n =86 people who return the info, because the other people are part of the non response rate, and from this sample she found that the proportion of athletes who believe that the enforcement of safety measures needs to be completely overhauled is \hat p=0.76.

Step-by-step explanation:

For this case the population represent all the professional athletes in the researcher city and we can assume that the sample size for tis population is N =982 and represent all the individuals of interest for the study and the parameter of interest is the proportion of athletes who believe that the enforcement of safety measures needs to be completely overhauled p.

In order to estimate te parameters of the population the researcher select a sample of 400 professional athletes and just 86 of them returns the questionnaire sent. So then the real sample is the n =86 people who return the info, because the other people are part of the non response rate, and from this sample she found that the proportion of athletes who believe that the enforcement of safety measures needs to be completely overhauled is \hat p=0.76.

6 0
3 years ago
The number of fish in a lake decreased by 25% between last year and this year. Last year there were 60 fish in the lake. What is
Advocard [28]

Answer:

15

Step-by-step explanation:

3 0
3 years ago
Tính đạo hàm <br>y=2x^3 - 9x^2 + 12x + 4
Liula [17]

Answer:

hihihihihihihihihihihihihihi

5 0
3 years ago
The price p, in dollars, of a specific ca that is x year old is modeled by the function p(x)=22,255(0.91)^x
uysha [10]

Answer:

Step-by-step explanation:

Answer:

Step-by-step explanation:

The price p, in dollars, of a specific car that is x year old is modeled by the function p(x)=22,255(0.91)^x

a) to determine the cost of a 2 year old car, we will substitute 2 for x in the given function. Therefore

p(2)=22,255(0.91)^2

p(2)=22,255 × 0.8281 = $18673.655

Approximately $18674

b) to determine the cost of a 7 year old car, we will substitute 7 for x in the given function. Therefore

p(7)=22,255(0.91)^7

p(2)=22,255 × 0.51676101936 = 11500.51648579693

Approximately $11501

c) 0.91 indicates exponential decay rate. It is a fixed percentage by which the value of the car decreases every year. It is determined by (1 - rate of decay)

7 0
3 years ago
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