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mash [69]
3 years ago
15

The sum of the​ length, width, and height of a rectangular package is 126 inches. If the length is 2 inches longer than five tim

es the height and the width is 2 inches shorter than three times the​ height, what is the volume of the​ package?
Mathematics
1 answer:
taurus [48]3 years ago
4 0

Answer:

Step-by-step explanation:

The length and the width are based on the height.

height: h

length: 5h + 2

width: 3h - 2

If the sum of those is 126, then:

h + 5h + 2 + 3h - 2 = 126 and

9h = 126 so

h = 14

length is 5(14) + 2 which is 72

width is 3(14) - 2 which is 40

The volume is found by multiplying the length times the width times the height:

14 * 72 * 40 = 40,320 inches cubed

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In a previous​ year, 58​% of females aged 15 and older lived alone. A sociologist tests whether this percentage is different tod
Gemiola [76]

Answer:

z=\frac{0.565 -0.58}{\sqrt{\frac{0.58(1-0.58)}{600}}}=-0.744  

Since is a bilateral test the p value would be given by:  

p_v =2*P(z  

And since the p value is higher than the significance level we have enough evidence to conclude that the true proportion is not significantly different from 0.58

Step-by-step explanation:

Information given

n=600 represent the random sample selcted

X=339 represent the number of females aged 15 and older that living alone

\hat p=\frac{339}{600}=0.565 estimated proportion of females aged 15 and older that living alone

p_o=0.58 is the value that we want to check

\alpha=0.01 represent the significance level

z would represent the statistic

p_ represent the p value

Sytem of hypothesis

We want to check if the true proportion females aged 15 and older that living alone is significantly different from 0.58.:  

Null hypothesis:p=0.58  

Alternative hypothesis:p \neq 0.58  

The statistic is given by:

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

Replacing the info given we got:

z=\frac{0.565 -0.58}{\sqrt{\frac{0.58(1-0.58)}{600}}}=-0.744  

Since is a bilateral test the p value would be given by:  

p_v =2*P(z  

And since the p value is higher than the significance level we have enough evidence to conclude that the true proportion is not significantly different from 0.58

5 0
3 years ago
Please solve Y ASAP please I’ll mark you as brainlister
iogann1982 [59]

Answer:

  • We are asked to solve for y
  • We will use trigonometric identities
  • Hence we know the small angle is 30 degree by 30-60-90 standars

8 0
3 years ago
A quiz consists of 10 true or false questions. To pass the quiz a student must answer at least eight questions correctly.
lys-0071 [83]

Answer:

The probability of  the student will pass the quiz = .0546

Step-by-step explanation:

Given -

Total no of question = 10

If the student guesses on each question there are two outcomes true of false

the probability  of guesses  question correctly =  \frac{1}{2}

the probability  of success is (p) =  \frac{1}{2}

the probability  of guesses  question incorrectly = \frac{1}{2}

the probability  of failure is (q) = 1- p = \frac{1}{2}

If the student guesses on each question he must answered at least 8 question correctly

the probability of  the student will pass the quiz = P(X\geq8 )

= P(X = 8 ) + P(X = 9) + P(X = 10 )

= \binom{10}{8}(p)^{8}(q)^{10 - 8} + \binom{10}{9}(p)^{9}(q)^{10 - 9} + \binom{10}{10}(p)^{10}(q)^{10 - 10}

= \frac{10!}{(2!)(8!)}(\frac{1}{2})^{8}(\frac{1}{2})^{10 - 8} +\frac{10!}{(1!)(9!)} (\frac{1}{2})^{9}(\frac{1}{2})^{10 - 9} + \frac{10!}{(0!)(10!)}(\frac{1}{2})^{10}(\frac{1}{2})^{10 - 10}

= 45\times\frac{1}{2^{10}} + 10\times\frac{1}{2^{10}} + 1\times\frac{1}{2^{10}}

= \frac{56}{2^{10}}

= .0546

5 0
3 years ago
Which of the following graphs has a slope of<br> -5 and a y-intercept of 4?
olga2289 [7]

Answer: B.

Step-by-step explanation:

I hope this helps!

4 0
3 years ago
Write 10 5/12 as an equivalent improper fraction
Alex73 [517]
10 5/12 written as an improper fraction is equivalent to 125/12
5 0
3 years ago
Read 2 more answers
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