2 years ago

Select all irrational numbers.

1 answer:

5 0

The only irrational numbers in this are

sqrt(12)
sqrt(20)

it is this way because the other numbers are sqrts of perfect squares.

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ankoles [38]

Answer:

wut

Step-by-step explanation:

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3 years ago

Kazeer [188]

Answer:

Step-by-step explanation:

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3 years ago

AfilCa [17]

Answer:

Yes. The male and female consumers differ in the amounts they spend.

Step-by-step explanation:

We can express the null and alternative hypothesis as:

$H_0: \mu_m=\mu_w\\\\H_1: \mu_m\neq\mu_w$

It is assumed a significance level of 0.05.

The standard deviation of the difference of means is calculated as:

$s=\sqrt{\frac{s_m^2}{n_m} +\frac{s_w^2}{n_w} } =\sqrt{\frac{35^2}{40} +\frac{20^2}{30} } =\sqrt{30.625+13.333} =\sqrt{43.958} =6.63$

The test statistic is

$t=\frac{(M_m-M_w)-0}{s}=\frac{135.67-68.64}{6.63}=10.11$

The degrees of freedom are:

$df=n_1+n_2-2=40+30-2=68$

The P-value for t=10.11 is P=0, so it is smaller than the significance level. The null hypothesis is rejected.

We can conclude that male and female consumers differ in the amounts they spend.

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3 years ago

Dmitry_Shevchenko [17]

Working conditions in the United States in the early 1900’s can best be described as atrocious.

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3 years ago

stellarik [79]

3(18 - x/3 = -7)

54-x = -21

-x = -75

x = 75

7 0

3 years ago