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3 years ago

Time (econds)

Mathematics

1 answer:

valkas [14]3 years ago

7 0

Answer:

76 the pattern goes in 12s every two years

Step-by-step explanation:

64 plus 12 is 76

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What is the quadratic equation of x2 - 7x + 6 = 0

s2008m [1.1K]

Answer:

x = 6 , 1

Step-by-step explanation:

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3 years ago

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Schach [20]

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3 years ago

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A carpenter earns $256 working on a 4-hour repair job. The next repair jobs, billed at the same rate, are a 3-hour job followed

Rama09 [41]

$256/4 hrs = 64 hrs

3 hrs x $64 = $192

2 hrs x $64 = $128

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4 years ago

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Look at the screenshot please

Karolina [17]

SA = s2<span> + 2 × s × </span>l<span>
l=7 s=9
SA=81+2x9x7
SA=81+126
SA=207 cm^2
ANswer is C</span>

8 0

3 years ago

Based on the information from Harper's Index, 37 out of 100 adult Americans who did not attend college believe in extraterrestri

vazorg [7]

Answer: Yes, this indicate the proportion of adult americans that attended college and believe in extraterrestrials is higher than the proportion that did not attend college.

Step-by-step explanation:

Since we have given that

Hypothesis:

$H_0:p_1=p_2\\\\H_a:p_1>p_2$

n₁ = 100

x₁ = 37

So, $p_1=\dfrac{x_1}{n_1}=\dfrac{37}{100}=0.37$

n₂ = 100

x₂ =47

So, $p_2=\dfrac{47}{100}=0.47$

At 0.01 level of significance, z = 2.33

So, test statistic value would be

$z=\dfrac{p_1-p_2}{\sqrt{\dfrac{p_1(1-p_1)}{n_1}+\dfrac{p_2(1-p_2)}{n_2}}}\\\\z=\dfrac{0.37-0.47}{\sqrt{\dfrac{0.37\times 0.63}{100}+\dfrac{0.47\times 0.53}{100}}}\\\\z=-1.44$

Since, 2.33>-1.44

Hence, we will reject the null hypothesis.

Therefore, Yes, this indicate the proportion of adult americans that attended college and believe in extraterrestrials is higher than the proportion that did not attend college

4 0

3 years ago