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2 years ago

Marking anybody who got it the brainliest

Mathematics

1 answer:

-Dominant- [34]2 years ago

5 0

Answer:

c = sqrt 13.4689 rounded to sqrt 13.5 = 3.5

Step-by-step explanation:

maybe A+ B totals sqrt 13 = 3.60555128 if so they have rounded down for c to = 9 then 6 + 8 added on ay = sqrt 6+ 8 = sqrt 14 = sq rt 3.74165739 in all effect if triangular = average of a= b = 3.67^2 = 13.4689 then through Pythagoras c = sqrt 13.4689 rounded to sqrt 13.5 = 3.5

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Alexus [3.1K]

-45.6 is the answer if you evaluate

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3 years ago

The attention span of children (ages 3 to 5) is claimed to be Normally distributed with a mean of 15 minutes and a standard devi

Agata [3.3K]

Answer:

If the observed sample mean is greater than 17.07 minutes, then we would reject the null hypothesis.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 15 minutes

Sample size, n = 10

Alpha, α = 0.05

Population standard deviation, σ = 4 minutes

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 15\text{ minutes}\\H_A: \mu > 15\text{ minutes}$

Since the population standard deviation is given, we use one-tailed z test to perform this hypothesis.

Formula:

$z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }$

Now, $z_{critical} \text{ at 0.05 level of significance for one tail} = 1.64$

Thus, we would reject the null hypothesis if the z-statistic is greater than this critical value.

Thus, we can write:

$z_{stat} = \displaystyle\frac{\bar{x} - 15}{\frac{4}{\sqrt{10}} } > 1.64\\\\\bar{x} - 15>1.64\times \frac{4}{\sqrt{10}}\\\bar{x} - 15>2.07\\\bar{x} > 15+2.07\\\bar{x} > 17.07$

Thus, the decision rule would be if the observed sample mean is greater than 17.07 minutes, then we would reject the null hypothesis.

6 0

4 years ago

What’s the correct answer

REY [17]

To find this you need to first figure out ow many total dresses were surveyed, which is 162. Now to find the percent you first need to take the number of red dresses and divide it by the total, so 14/162. That equals 0.086. Then to get to a percent, shift the decimal two places to the right, so 8.6%. The round to the nearest percent which is 9%. So the correct answer would be A.

5 0

3 years ago

Read 2 more answers

Can someone help me out with some pesky math quiz :) I put a pic

Sindrei [870]

1. Simplifying ∛54 gives 3∛2

2. 27^1/3 * (27)^3 is equal to 27

3. The expression (2j4k)^4/5 can be written as $\sqrt[4]{32j^{20}k^{5} }^{5}$ making the first option the correct option

4. simplifying $\sqrt[4]{16x^{4} y^{12} }$ will result to 2x∛y

5. simplifying $\sqrt[5]{2940x^{13} y^{7} }$ will result to $14x^{6} y^{3} \sqrt{15xy}$ making the last option the correct option

<h3>How to simplify $\sqrt[5]{2940x^{13} y^{7} }$ </h3>

<u>given data</u>

$\sqrt[5]{2940x^{13} y^{7} }$

= ( 2940 * x^13 * y^7 )^1/5

$= ( 2^2 * 5 * 3 * 7^2 * x^{12} * x * y^6 * y )^{1/5}$

$= ( 2^2 * 5 * 3 * 7^2 * x^{12} * x * y^6 * y )^{1/5*5/2}$

$= ( 2^2 * 5 * 3 * 7^2 * x^{12} * x * y^6 * y )^{5/5*1/2}$

multiplying the values inside the parenthesis by ^1/2

$= ( 2 * 5^{1/2} * 3^{1/2} * 7 * x^{6} * x^{1/2} * y^3 * y^{1/2} )$

$= ( 14* 5^{1/2} * 3^{1/2} * x^{6} * x^{1/2} * y^3 * y^{1/2} )$

$= ( 14 * x^6 * y^3 ) ( 5^{1/2} * 3^{1/2} * x^{1/2} * y^{1/2} )$

$= ( 14x^6y^3 ) ( 15^{1/2} * x^{1/2} * y^{1/2} )$

$= ( 14x^6y^3 ) ( 15xy)^{1/2}$

$= ( 14x^6y^3 ) \sqrt{( 15xy)}$

we can therefore say that the last option is the answer

Read more on equations here: brainly.com/question/22688504

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3 0

1 year ago

The expression 16 -3/4 is equivalent to the expression....<br> all the answers are in rooting form..

viva [34]

Looking at your "<span>16 -3/4," I see only one possibility: "combine the following."

</span><span>16 -3/4 is the same as 15 + 4/4 - 3/4, or 15 1/4.

Similarly, 16 - 0.75 = 15.25 = 15 1/4.</span>

8 0

4 years ago

Marking anybody who got it the brainliest​​

Marking anybody who got it the brainliest