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Svetradugi [14.3K]
4 years ago
8

Use the rational exponent property to write an equivalent expression for

Mathematics
1 answer:
Stels [109]4 years ago
4 0

For this case we have that by definition, a rational exponent is an exponent that can be expressed as \frac {a} {b}, where a and b are integers and n is nonzero.

The exponent \frac {1} {a} indicates the "a" root.x ^ {\frac {1} {a}} = \sqrt [a] {x}

We have the following expression:

\sqrt [5] {n ^ 4} + 3-12 =

Different signs are subtracted and the sign of the major is placed:

\sqrt [5] {n ^ 4} -9 =

Applying the property:

n ^ {\frac {4} {5}} - 9

Answer:

n ^ {\frac {4} {5}} - 9

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A study was conducted to determine whether magnets were effective in treating pain. The values represent measurements of pain us
amm1812

Answer:

Given:

Sham: n= 20,     x=0.44,   s=1.24,

Magnet:n= 20,  x =0.49,   s= 0.95

For Sham:

Sample size, n = 20

Sample mean = 0.44

Standard deviation = 1.24

For Magnet:

Sample size = 20

Sample mean = 0.49

Standard deviation = 0.95

The null and alternative hypotheses:

H0: s1²=s2²

H1: s1² ≠ s2²

a) To find the test statistics, use the formula:

\frac{s1^2}{s2^2}

\frac{1.24^2}{0.95^2} = \frac{1.5376}{0.9025} = 1.7037

Test statistics = 1.7037

b) P-value:

Sham: degrees of freedom = n - 1 = 20 - 1 = 19

Magnet: degrees of freedom = n - 1 = 20 - 1 = 19

The critical values:

[Za/2, df1, df2)], [(1 - Za/2), df1, df2]

f[0.05/2, 19, 19], f[(1 - 0.05/2), 19, 19]

f[0.025, 19, 19], f[0.975, 19, 19]

(2.526, 0.3958)

The rejection region:

Reject H0, if  F < 0.3958 or if F > 2.526

c) Conclusion:

Since the critical values of test statistic is between (0.3958 < 1.7037 < 2.526), we fail to reject null hypothesis H0.

There is insufficient evidence to to support the claim that those given a sham treatment have reductions that vary more than those treated with magnets

3 0
3 years ago
Solve. d + 4 = –1 A. –5 B. –3 C. 3 D. 5
77julia77 [94]
The answer to your question is -5
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3 years ago
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Lisa needs to arrive in Ankara from Istanbul in the next 5 hours. She wants to save as much money as possible, while minimizing
DerKrebs [107]

Answer:

The answer is C. Train

Step-by-step explanation:

3 0
3 years ago
Please help me! I will give brainliest to the best answer
8_murik_8 [283]
1. When there are two events that need to happen, we must multiply the probability of each event happening.

Shawn losing to Mike: 5/8 chance
Shawn losing to Tim: 2/7 chance

5/8 × 2/7 = 10/56 = 5/28

There's a 5/28 chance of Shawn losing to Mike and Tim.

I don't know #2, sorry :/

Hope this helps!
5 0
3 years ago
What is the exact volume of the sphere? the radius is 4.8
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V = 4/3πr³
V= 4/3π(4.8)³
V= 4/3π(110.592)
V=147.456π
5 0
3 years ago
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