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yKpoI14uk [10]
3 years ago
13

I NEED THIS ASAP!!!!!!!

Mathematics
1 answer:
fiasKO [112]3 years ago
8 0

Answer:

Its only 5 times larger!

Step-by-step explanation:

5 x 10*5= 500000

1 x 10*5= 100000

1 x 10*5 x 5 = 500000

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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
Simplify 63:18 please show working.​
marusya05 [52]
63:18
divide both sides by 3
= 21:6
divide by 3 again
= 7:2
8 0
3 years ago
Read 2 more answers
What is the total cost of a sweatshirt if the regular price is $42 and the sales tax is 5 1/2
leonid [27]

Answer:

$44.31

Step-by-step explanation:

Regular Price = $42

Sales Tax Rate = 5  1/2% or 5.5%

The total cost would be the regular price PLUS the sales tax. We find the sales tax by finding 42's 5.5%.

First, converting percentage to decimal (dividing by 100):

5.5% = 5.5/100 = 0.055

Now finding 5.5% of $42:

42 * 0.055 = $2.31

Now, the total price is the SUM of regular and this sales tax:

Total Price = 42 + 2.31 = $44.31

6 0
3 years ago
Find cos x if sin x =0.82.
True [87]

Answer:

cosx= 35. Use Trignometrical identity cosx = √1−sin2x . cos x = √1−1625 = √925 = 35 to be the ...

Missing: =0.82 ‎| Must include: =0.82

Step-by-step explanation:

5 0
3 years ago
I need help please 20 mins
vesna_86 [32]

Answer:

x is 157 because since they are alternate interior angles, the two angles given are the same degree

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4 years ago
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