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3 years ago

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I need help with this math

1 answer:

ryzh [129]3 years ago

6 0

Answer:

Right angle

Step-by-step explanation: you take the 57% angle and ad that with

the 33% angle and you got a prefect 90% also known as a "Right angle"

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Nitella [24]

im not sure but maybe sorry

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2 years ago

1) A research team is planning to use an ice drill at the top of a glacier. The team plans to use the drill for 10 hours each da

MaRussiya [10]

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Answer is 50 trust me

Step-by-step explanation:

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3 years ago

What is the input if the output is 0 ?

Elodia [21]

In other words, what is <em>y</em> if <em>x</em> is 0.

Look on the graph, a line passes through point, $A(x,y)\longrightarrow A(0,-3)$

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Hope this helps.

<u>r3t40</u>

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3 years ago

Subtract: (3x2 − 8x + 3) − (−5x2 + 4x − 5)

Alenkinab [10]

The answer should be A).

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2 years ago

Read 2 more answers

If a manufacturer conducted a survey among randomly selected target market households and wanted to be 95% confident that the d

katen-ka-za [31]

Answer:

We need a sample size of least 119

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

Sample size needed

At least n, in which n is found when $M = 0.09$

We don't know the proportion, so we use $\pi = 0.5$ , which is when we would need the largest sample size.

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.09 = 1.96\sqrt{\frac{0.5*0.5}{n}}$

$0.09\sqrt{n} = 1.96*0.5$

$\sqrt{n} = \frac{1.96*0.5}{0.09}$

$(\sqrt{n})^{2} = (\frac{1.96*0.5}{0.09})^{2}$

$n = 118.6$

Rounding up

We need a sample size of least 119

6 0

3 years ago