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3 years ago

Simplify √72 Please help will give brainliest to first CORRECT answer

Mathematics

2 answers:

k0ka [10]3 years ago

5 0

Answer:

The answer would be 6√2

Step-by-step explanation:

marishachu [46]3 years ago

4 0

Answer:

8.49

Step-by-step explanation:

The actual answer is 8.48528137424, rounding to the nearest hundred, you would get 8.49

You can get this by doing this on a calculator or on a paper!

Hope this helped, brainliest always appreciated!

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Evaluate the expression 4−(1−4)−2 =

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Parentheses first. 1-4= -3. 4-3=1. 1-2=-1.

The answer is -1.

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3 years ago

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Mica takes a train to visit a friend. The graph shows Mica's trip from his home in New Jersey to his friend's home in Maine. Whi

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A company claims that less than 10% of adults own a smart watch. You want to test this claim, and you find that in a random samp

Nezavi [6.7K]

Answer:

Test statistic is 0.67

Critical value is -2.33

Step-by-step explanation:

Consider the provided information.

The formula for testing a proportion is based on the z statistic.

$z=\frac{\hat p-p_0}{\sqrt{p_0\frac{1-p_0}{n}}}$

Were $\hat p$ is sample proportion.

$p_0$ hypothesized proportion and n is the smaple space,

Random sample of 100 adults, 12% say that they own a smart watch.

A company claims that less than 10% of adults own a smart watch.

Therefore, n = 100 $\hat p$ = 0.12 , $P_0$ = 0.10

$1 - P_0 = 1 - 0.10 = 0.90$

Substitute the respective values in the above formula.

$z=\frac{0.12-0.10}{\sqrt{0.10\frac{0.90}{100}}}$

$z\approx 0.67$

Hence, test statistic = 0.67

This is the left tailed test.

Now using the table the P value is:

P(z < 0.667) = 0.7476

P-value = 0.7476

$\alpha = 0.01$

Here, P-value > α therefore, we are fail to reject the null hypothesis.

$Z_{\alpha}= Z_{0.01} = -2.33$

Hence, Critical value is -2.33

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3 years ago

Which of the following random variables is not discrete?

Ilia_Sergeevich [38]

Answer:

b) The annual rainfall in a city

Step-by-step explanation:

Remember, a discrete variable is one that can only take a finite number of values between any two values of a characteristic and a continuous variable is one that can take an infinite number of values between any two values of a characteristic.

a) Observe that the variable x='classes taken in one semester' can take the values 0,1,2,...,n.

Then the variable x is discrete

b) Observe that the variable x='annual rainfall in a city' can take the values 2in, 1.6in, 5.1 in, 0.1in

Then, the variable x can be take a infinite number of values between two number. So x isn't a discrete variable.

c) The variable x='attendance at a football game' can take the values 3000,5000... n. And never will be a decimal number because There cannot be a personal decimal number. Therefore, x is a discrete variable.

d) The variable x='patients treated at an emergency room in a day' can take the values 1,2,3,...,n. And never will be a decimal number because There cannot be a personal decimal number. Therefore, x is a discrete variable.

7 0

3 years ago

Last summer ronald grew from 5 7/12 feet tall to 6 1/8 feet tall how much did ronald grow

MissTica

Answer:

13/24 i think

Step-by-step explanation:

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3 years ago