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galben [10]
1 year ago
5

Answer both 2 and 3 please

Mathematics
1 answer:
QveST [7]1 year ago
4 0
<h3>Time units.</h3>

2.

1 day = 24h

1h = 60min

We have 4h 20min

4h + 20min = 4h+\dfrac{20}{60}h=4h+\dfrac{1}{3}h=4\dfrac{1}{3}h=\dfrac{13}{3}h

\dfrac{\frac{13}{3}}{24}=\dfrac{13}{3}\cdot\dfrac{1}{24}\\\\\huge\boxed{(D)\ \dfrac{13}{72}}

3.

6:51PM + 9min → 7:00PM

7:00PM + 27min → 7:27PM

9min + 27min = 36min

36min=\dfrac{36}{60}h=\dfrac{3}{5}h

\huge\boxed{(C)\ \dfrac{3}{5}}

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3 years ago
A sample of 20 account balances of a credit company showed an average balance of $1,170 and a standard deviation of $125. You wa
Lady_Fox [76]

Answer:

The P-value for this test is P=0.2415.

Step-by-step explanation:

We have to perform an hypothesis testing on the mean of alla account balances.

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Then, the null and alternative hypothesis are:

H_0: \mu=1150\\\\H_a: \mu>1150

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The degrees of freedom fot this test are:

df=n-1=20-1=19

For this one-tailed test and 19 degrees of freedom, the P-value is:

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Michael estimated his mass as 8 kilograms
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His estimate is reasonable. But only if Michael is less than 2 years old.
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PLS HELPP ME <br><br> 0.27500 in simplest form
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Answer:

0.275

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