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Natasha2012 [34]
3 years ago
15

Help? im really bad at math:(

Mathematics
2 answers:
kap26 [50]3 years ago
5 0

Answer:

12 the answer is 12 plants

250*12=3000

3000 milliliters =3 liters

Andreas93 [3]3 years ago
3 0

Answer:m2 I’m bad

Step-by-step explanation:

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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
4 years ago
Find the solution for 5x-7y=17 and 9x-7y=-11
ad-work [718]

Step-by-step explanation:

Refer to attachment.

<em>Hope</em><em> </em><em>it</em><em> </em><em>helps</em><em>.</em>

8 0
3 years ago
You want to be able to withdraw $4000 a month for 30 years how much would you need to have in your account with an APR of 3.4% t
tigry1 [53]

Answer:

  $904,510.28

Step-by-step explanation:

If we assume the withdrawals are at the beginning of the month, we can use the annuity-due formula.

  P = A(1 +r/n)(1 -(1 +r/n)^(-nt))/(r/n)

where r is the APR, n is the number of times interest is compounded per year (12), A is the amount withdrawn, and t is the number of years.

Filling in your values, we have ...

  P = $4000(1 +.034/12)(1 -(1 +.034/12)^(-12·30))/(.034/12)

  P = $904,510.28

You need to have $904,510.28 in your account when you begin withdrawals.

8 0
3 years ago
Tom likes to go over to his friend's house almost every night to play video games. They usually spend 3 hours a night playing th
gulaghasi [49]

Answer:

it is 10

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
How do u solve this problem <br> -1(4x-3)-5x+2
Sergeeva-Olga [200]
-1(4x-3)-5x+2
-4x+3-5x+2
-9x+6

i just simplified it. was there supposed to be more to this problem or is thins what you wanted?
3 0
4 years ago
Read 2 more answers
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