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2 years ago

I need this one too

Mathematics

2 answers:

iren2701 [21]2 years ago

7 0

Answer:

i would say 42

Step-by-step explanation:

laiz [17]2 years ago

7 0

5^3 + 6[2 - 4(7-8)^2] = 125 + 6(-2)

= 125 - 12

<em> = 113</em>

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Joe heard from a reliable source that only 22% of people actually sleep 8 hours or more per night. You do a survey and find 58 o

Juliette [100K]

Answer:

95% Confidence interval: (31.32%,47.04%)

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 148

Number of people who sleep for 8 hours or longer, x = 58

$\hat{p} = \dfrac{x}{n} = \dfrac{58}{148} = 0.3918$

95% Confidence interval:

$\hat{p}\pm z_{stat}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

$z_{critical}\text{ at}~\alpha_{0.05} = 1.96$

Putting the values, we get:

$0.3918\pm 1.96(\sqrt{\dfrac{0.3918(1-0.3918)}{148}})\\\\ = 0.3918\pm 0.0786\\\\=(0.3132,0.4704)=(31.32\%,47.04\%)$

(31.32%,47.04%) is the required 95% confidence interval.

8 0

3 years ago

A jar contains 2 green marbles, 4 blue marbles, and 3 yellow marbles. A marble is chosen at random from the jar and replaced. Fi

omeli [17]

Answer:

2/27

Explanation:

• Number of green marbles = 2

• Number of blue marbles = 4

• Number of yellow marbles = 3

Total = 2+4+3 =9

• Probability of choosing a green marble = 2/9

• Probability of choosing a yellow marble = 3/9

Therefore, the possibility that the first marble is green and the second is yellow is:

$\begin{gathered} =\frac{2}{9}\times\frac{3}{9} \\ =\frac{2}{27} \end{gathered}$

8 0

10 months ago

Please answer asap!!

jonny [76]

-3x(-7) = -3(-2)(-7) ⇒ -42

-42 would be the answer.

4 0

3 years ago

Read 2 more answers

What is the solution to the given inequality?

xenn [34]

Answer: x ≤3

Step-by-step explanation:

Your answer is correct

7 0

2 years ago

Help me i dont know what i am doing at all

nika2105 [10]

You are doing the distributive property.
68.5j+76.54

7 0

2 years ago