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Scorpion4ik [409]
3 years ago
11

Solving proportions 6 over 2 = 4 over p

Mathematics
1 answer:
Yanka [14]3 years ago
5 0
6/2 = 4/p
3 = 4/p
p = 4/3

answer
p = 4/3
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A researcher wished to compare the effect of two stepping heights (low and high) on heart rate in a step-aerobics workout. A col
Alinara [238K]

Answer:

The answer is "between 0.10 and 0.05".

Step-by-step explanation:

For sample 1:

n_1 = 25\\\\\bar{x_1} = 90.00\\\\ s_1 = 9\\\\

For sample 2:

n_2 = 25\\\\ \bar{x_2} = 95.08\\\\ S_2 = 12\\\\

Calculating the null and alternative hypotheses:

H_O : \mu_1 = \mu_2 \\\\ H_Q : \mu_1  

Calculating the test statistic:

Z= \frac{90-95.08}{ \sqrt{\frac{9^2}{25}+\frac{12^2}{25}}} \\\\ =\frac{-5.08}{ \sqrt{\frac{81}{25}+\frac{144}{25}}}\\\\=\frac{-5.08}{ \sqrt{\frac{81+144}{25}}}\\\\=\frac{-5.08}{ \sqrt{\frac{225}{25}}}\\\\=\frac{-5.08}{ \frac{15}{5}}\\\\=\frac{-5.08}{3}\\\\= -1.693

Calculating the conservative degrees of freedom:

DF = min (n_1 -1, n_2 - 1) = min(25-1, 25-1) = 24

by using Excel the p-value for left tailed test and for test statistic will be -1.693 with DF = 24.

\to p-value = TDIST(1.693, 24, 1) = 0.0517\ \ \ \  i.e, \bold{0.05 < p-value < 0.10}

5 0
3 years ago
Solve for kkk.
Likurg_2 [28]

Answer:

k=\frac{3}{2}

Step-by-step explanation:

Given:

\frac{k}{4}=\frac{3}{8}

To find: value of k

Solution:

Cross-multiplying is a method in which the numerator of each (or one) side is multiplied by the denominator of the other side.

\frac{k}{4}=\frac{3}{8}

On cross-multiplication, the equation becomes k\times 8=4\times 3

8k=12

Divides both sides by 8

\frac{8k}{8}=\frac{12}{8}\\k=\frac{12}{8}=\frac{3}{2}

5 0
3 years ago
Read 2 more answers
What is the value of c in the function x^2-7x+c to make it a perfect square trinomial?
evablogger [386]

Answer:

c = 49/4

Step-by-step explanation:

The given expression is x^2 - 7x + c

This trinomial must be a perfect square.

Therefore, c must be a prefect square number.

So b^2 - 4ac = 0. That is discriminant must be equal to zero.

In the given expression a =1 and b = -7

Now plug in these values in the discriminant formula.

(-7)^2 - 4*1*c = 0

49 -4c = 0

4c = 49

c =  49/4

x^2 - 7x + 49/4 = (x - 7/2)^2

which is perfect square trinomial.

Thank you.

5 0
3 years ago
If every day I make 2 dollars and every time I reach 50 dollars it adds 25 cents to my daily income how many days will it take f
Vsevolod [243]

9514 1404 393

Answer:

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We assume the daily rate increases at each multiple of $50. When the balance reaches $50 on day 25, the pay on day 26 is $2.25.

Similarly, when the balance reaches 9628.75 on day 658, the pay will be $50 on day 659.

__

I found this easiest to solve using a computer program. A spreadsheet can do it by computing the number of days between raises. This is shown in the attachment.

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3 years ago
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Phoenix [80]

The right ans is A.hope it will help u.........

8 0
4 years ago
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