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Yuki888 [10]
3 years ago
15

if juanita and her friends made nine friendship bracelets in three hours how many could they make in 15 hours? which proportion

would be used to solve this problem
Mathematics
2 answers:
tangare [24]3 years ago
4 0
The answer 45 bracelets
tigry1 [53]3 years ago
4 0
3 divide by 15 is 5 so 5 divide by 9 is 1.8 your answer is 1.8

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Stolb23 [73]
36100/36789=0.9812715757427492
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Write the point-slope form of the equation for a line that passes through (6, -1) with a slope of 2.
Naddika [18.5K]

Answer:

2x-y-13=0

Step-by-step explanation:

6 0
2 years ago
Lauren bought 5 pizzas for $17 each. She paid with a $100 bill.
Lelechka [254]
The first blank is 17
2nd blank is 85
3rd blank is 15

wat happened is
C=paid-costofpizzas
paid=100
costofpizzas=number of pizzas times cost per pizza
costofpizzas=5 times 17

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3 years ago
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Serena paid $194.99 for a game system and then bought two equally-priced games. If she spent a total of $284.97, what is the pri
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3 0
3 years ago
A pathologist knows that 14.9% of all deaths are attributable to myocardial infarctions (a type of heart disease). (Either you h
garik1379 [7]

Answer:

a) The mean number is 745 and the standard deviation is 25.18.

b) 896 deaths is a significantly high number, which means that there is cause for concern.

Step-by-step explanation:

For each death, there are only two possible outcomes. Either it is attributable to myocardial infarctions, or it is not. The probability of a death being attributable to myocardial infarctions is independent of other deaths. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

The expected value of the binomial distribution is:

E(X) = np

The standard deviation of the binomial distribution is:

\sqrt{V(X)} = \sqrt{np(1-p)}

A value X is significantly high is:

X > E(X) + 2\sqrt{V(X)}

In this problem:

p = 0.149, n = 5000

a. Find the mean and standard deviation for the number of such deaths that will occur in typical region with 5000 deaths.

E(X) = np = 5000*0.149 = 745

\sqrt{V(X)} = \sqrt{np(1-p)} = \sqrt{5000*0.149*0.851} = 25.18

The mean number is 745 and the standard deviation is 25.18.

b. In one region, 5000 death certificates are examined, and it is found that 896 deaths were attributable to myocardial infarction. Is there cause for concern? Why or why not?

Is 896 a significantly high number?

E(X) + 2\sqrt{V(X)} = 745 + 2*25.18 = 795.36

895 > 795.36

896 deaths is a significantly high number, which means that there is cause for concern.

6 0
3 years ago
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