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Slav-nsk [51]
4 years ago
13

10 points!!!!!!!!! easy math

Mathematics
2 answers:
Masja [62]4 years ago
7 0

Answer:

P

Step-by-step explanation:

The approx. number would be 4.7 on the number line.

~theLocoCoco

Olegator [25]4 years ago
4 0

Answer:

Q

Step-by-step explanation:

\sqrt{23} = 4.8 = 4 4/5

\sqrt{23} = 4.79583152331...     If you round the answer it would be 4.8

Hope this helps you, can you mark me brainliest?

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PLEASE HELP!! I WILL GIVE BRAINLIEST!
deff fn [24]

the answer is C)18 sorry if it was to late

8 0
3 years ago
Solving the system using equations ( 15 points)<br> 3x+2y=17<br> 2x+5y=8
Aleks04 [339]

Answer:

{x,y}={  11 /69   ,−  11 /10  }

Step-by-step explanation:

5 0
3 years ago
A.) Prove that the ratio of two rational numbers must be rational.
Luda [366]

Answer:

v — Prove that (ax + b)/(cx + d) is irrational if and only if ad = bc. ... If b = 0, we have (ax + b)/(cx + d) = 0 is rational; if c = 0, since ... nonzero integers m, n ∈ Z. Then we have ... Proof. We prove by induction. When n = 1, both sides are 1/2 hence the ... So there are less than (k + 1)(2k + 1)k+1 (actually muc

Step-by-step explanation:

c — Prove that (ax + b)/(cx + d) is irrational if and only if ad = bc. ... If b = 0, we have (ax + b)/(cx + d) = 0 is rational; if c = 0, since ... nonzero integers m, n ∈ Z. Then we have ... Proof. We prove by induction. When n = 1, both sides are 1/2 hence the ... So there are less than (k + 1)(2k + 1)k+1 (actually muc

4 0
3 years ago
A random sample of medical files is used to estimate the proportion p of all people who have blood type B. (a) If you have no pr
GaryK [48]

Answer:

a) 752 medical files should be included.

b) 372 medical files should be included.

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 z-score that has a p-value of 1 - \frac{\alpha}{2}.

The margin of error is of:

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

90% confidence level

So \alpha = 0.1, z is the value of Z that has a p-value of 1 - \frac{0.1}{2} = 0.95, so Z = 1.645.

Question a:

This is n for which M = 0.03. We have no estimate, so we use \pi = 0.5. So

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

0.03 = 1.645\sqrt{\frac{0.5*0.5}{n}}

0.03\sqrt{n} = 1.645*0.5

\sqrt{n} = \frac{1.645*0.5}{0.03}

(\sqrt{n})^2 = (\frac{1.645*0.5}{0.03})^2

n = 751.67

Rounding up:

752 medical files should be included.

Question b:

Now we have that:

\pi = \frac{13}{90} = 0.1444

So

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

0.03 = 1.645\sqrt{\frac{0.1444*0.8556}{n}}

0.03\sqrt{n} = 1.645\sqrt{0.1444*0.8556}

\sqrt{n} = \frac{1.645\sqrt{0.1444*0.8556}}{0.03}

(\sqrt{n})^2 = (\frac{1.645\sqrt{0.1444*0.8556}}{0.03})^2

n = 371.5

Rounding up:

372 medical files should be included.

8 0
3 years ago
Write 0.000045 in scientific notation.
shutvik [7]
In scientific notation, it would be: <span> 4.5 · 10-5
SO, OPTION C IS YOUR ANSWER.</span>
6 0
4 years ago
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