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3 years ago

PLS HELP ME ASAP WILL MARK BRAINLIEST!!

Mathematics

1 answer:

My name is Ann [436]3 years ago

8 0

Answer:

1. Rational

2. Integer

3. Irrational

4. Irrational

5. Imaginary

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An article claims that 12% of trees are infested by a bark beetle. A random sample of 1,000 trees were tested for traces of the

inna [77]

Answer: 0.6812

Step-by-step explanation:

Let p be the population proportion of trees are infested by a bark beetle.

As per given: p= 12%= 0.12

Sample size : n= 1000

Number of trees affected in sample = 1000

Sample proportion of trees are infested by a bark beetle. = $\hat{p}=\dfrac{127}{1000}=0.127$

Now, the z-test statistic : $z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}$

So, $z=\dfrac{0.127-0.12}{\sqrt{\dfrac{0.12\times 0.88}{1000}}}$

$z=\dfrac{0.007}{\sqrt{\dfrac{0.1056}{1000}}}\\\\\\=\dfrac{0.007}{\sqrt{0.0001056}}\\\\\\=\dfrac{0.007}{0.010276}\approx0.6812$

Hence, the value of the z-test statistic = 0.6812 .

7 0

4 years ago

Need help need this done

Lapatulllka [165]

Answer:

$\huge\boxed{m=-12}$

Step-by-step explanation:

In order to solve for this equation, we can simplify this expression until we have m isolated on one side of it.

$-5(3m+6)=-3(4m-2)$

Distribute the left and right side:

$-15m-30=-12m+6$

Add 30 to both sides:

$-15m=-12m+36$

Add 12m to both sides:

$-3m=36$

Divide both sides by -3:

$m = -12$

So m = -12.

Hope this helped!

5 0

3 years ago

Read 2 more answers

Select the correct answer.

Tanya [424]

Answer :

the answer is $8

Step-by-step explanation:

4 0

4 years ago

The solution for x – 3 ≤ 10:<br> A) x >= 7<br> B) x <= 7<br> C) x >= 13<br> D) x <= 13

Vladimir79 [104]

Answer:

Step-by-step explanation:

Move all terms not containing

x to the right side of the inequality.

Inequality Form:

x≤13

Interval Notation:

(−∞,13]

3 0

3 years ago

Tickets for a concert cost$10 each if you order them on line but you must pay a service change of $8 per order. The tickets are

Sloan [31]

Answer:

Step-by-step explanation:

8 0

4 years ago