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3 years ago

Can someone please help me, I don't understand

Mathematics

1 answer:

IRINA_888 [86]3 years ago

5 0

The answer I think should be right would be 3.

It’s odd because you need to round it. But anyway I hope this helped. Rate my answer if I was wrong or correct

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Express 34% as a fraction in simplest form.<br> 34/100<br> 8/25<br> 17/50<br> 3/4

Archy [21]

Did you just state the answer? Because it seems like you just answered the question for us.

7 0

3 years ago

A researcher at the University of Washington medical school believes that energy drink consumption may increase heart rate. Supp

Nana76 [90]

Answer:

Step-by-step explanation:

Given that:

mean μ = 70

sample size = 25

sample mean = 73

standard deviation = 7

level of significance = 0.10

The null hypothesis and the alternative hypothesis can be computed as follows:

$\mathtt{H_o : \mu = 70} \\ \\ \mathtt{H_1 : \mu > 70 }$

The z score for this statistics can be calculated by using the formula:

$z = \dfrac{X- \mu}{\dfrac{\sigma}{\sqrt{n}}}$

$z = \dfrac{73- 70}{\dfrac{7}{\sqrt{25}}}$

$z = \dfrac{3}{\dfrac{7}{5}}$

$z = \dfrac{3 \times 5}{{7}{}}$

z = 2.143

At level of significance of 0.10

degree of freedom = n -1

degree of freedom = 25 - 1

degree of freedom = 24

The p - value from the z score at level of significance of 0.10 and degree of freedom of 24 is:

P - value = 1 - (Z < 2.143)

P - value = 1 - 0.9839

P - value = 0.0161

Decision Rule: since P value is lesser than the level of significance, we reject the null hypothesis.

Conclusion: We conclude that energy drink consumption increases heart rate.

5 0

3 years ago

its back to school time and fred wants to buy sneakers. the sneakers cost $57 and he has 52.80$ in the bank. he also has seven q

Andrew [12]

$1.78 is your answer

5 0

3 years ago

Read 2 more answers

3 thank you so much!!!

Alecsey [184]

Answer:

(6,2)

Step-by-step explanation:

all steps are shown and pictured

4 0

3 years ago

What is a point-slope equation of the line with slope -12 that goes through the point (5,3)

laila [671]

Answer:

y-3 = -12 (x-5)

Step-by-step explanation:

The point slope form of an equation is

y-y1 = m(x-x1) where m is the slope and (x1,y1) is the point

y-3 = -12 (x-5)

7 0

3 years ago