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3 years ago

please answer the question in the picture (no need to show your work just pls have something to back up your answer)

Mathematics

2 answers:

Hoochie [10]3 years ago

6 0

Answer:

the answer is D

Step-by-step explanation:

10 to the power of -3 is equivalent to 1/10 to the power of 3.

Jobisdone [24]3 years ago

4 0

The answer is d 10 to the power of neg 3 is equal to the fraction and decimal

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Jennifer made 5 liters of punch for her party. Her brother made another 750 mL. If they combine the two batches, how many 180mL

Nat2105 [25]

We know that

1 liter----------------> 1000 ml
Jennifer punch is 5 liters----------------> 5*1000=5000 ml
Her brother punch-------------------------> 750 ml
[total two batches]=(5000+750)----------> 5750 ml

the answer part A) is 5750 ml

Part B) how many 180 mL servings would they have?
[180 mL servings]=5750/180=31.94-----------> 31

they would have 31 (180 ml servings)
punch left over=[5750-31*180]=170 ml
there would be 170 ml of punch left over

7 0

3 years ago

Claim: High school teachers have incomes with a standard deviation that is more than $17, 500. A recent study of 136 high scho

Scilla [17]

Answer:

Part a

For this case the claim is:

$\sigma >17500$

And that represent the alternative hypothesis.

Part b: Null and alternative hypothesis

On this case we want to check if the population deviation is higher than 17500, so the system of hypothesis would be:

Null Hypothesis: $\sigma \leq 17500$

Alternative hypothesis: $\sigma >17500$

Calculate the statistic

For this test we can use the following statistic:

$\chi^2 =\frac{n-1}{\sigma^2_0} s^2$

And this statistic is distributed chi square with n-1 degrees of freedom. We have eveything to replace.

$\chi^2 =\frac{136-1}{17500^2} 18500^2 =150.869$

Step-by-step explanation:

Notation and previous concepts

A chi-square test is "used to test if the variance of a population is equal to a specified value. This test can be either a two-sided test or a one-sided test. The two-sided version tests against the alternative that the true variance is either less than or greater than the specified value"

$n=136$ represent the sample size

$\alpha$ represent the confidence level

$s^2 =18500^2$ represent the sample variance obtained

$\sigma^2_0 =17500^2$ represent the value that we want to test

Part a

For this case the claim is:

$\sigma >17500$

And that represent the alternative hypothesis.

Part b: Null and alternative hypothesis

On this case we want to check if the population deviation is higher than 17500, so the system of hypothesis would be:

Null Hypothesis: $\sigma \leq 17500$

Alternative hypothesis: $\sigma >17500$

Calculate the statistic

For this test we can use the following statistic:

$\chi^2 =\frac{n-1}{\sigma^2_0} s^2$

And this statistic is distributed chi square with n-1 degrees of freedom. We have eveything to replace.

$\chi^2 =\frac{136-1}{17500^2} 18500^2 =150.869$

4 0

3 years ago

Evaluate: |-18|+|-15|+|-8|

Zarrin [17]

Answer:

18+15+8= 41

Step-by-step explanation:

some words to ask

8 0

3 years ago

Read 2 more answers

Find the value of x and y

Inessa [10]

Answer: D. x=9√3; y=18

Step-by-step explanation:

This is a 30-60-90 special triangle, where we can use the rules to find the value of x and y. (For specific explanation, please look at the attachment below)

-----------------------------------------------------------------------------------------------------

X value

- The shortest side of the triangle that corresponds with [x] is 9 units. This is because it is half of the larger triangle's side length.

- Using the rules, the shortest side is x, then the second short side is x√3

- Substitute value in= x√3=(9)√3=9√3

Y value

- The shortest side of the triangle that corresponds with [x] is 9 units. This is because it is half of the larger triangle's side length.

- Using the rules, the shortest side is x, then the longest side is 2x

- Substitute value in= 2x=2(9)=18

Hope this helps!! :)

Please let me know if you have any questions

3 0

3 years ago

Pls give me the answer.

IgorC [24]

Answer:

Shrek

Step-by-step explanation:

Shrek is the answer to everything. Through every movie, different problems including magical and INTERDIMENSIONAL are thrown at him, and he still saves the day. Therefore, shrek is the answer.

3 0

3 years ago