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3 years ago

Pls pls pls pls pls help me

SAT

2 answers:

mash [69]3 years ago

6 0

The first one hehehejsisososowoso you’re welcome

Sidana [21]3 years ago

6 0

I think the answer is the first one. If you use the process of answer elimination it makes the most sense.

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Does the confidence interval give convincing evidence of a difference in the population mean number of pairs of shoes for boys a

lidiya [134]

The confidence interval did give convincing evidence that there is difference in the population mean number of pairs of shoes for boys and girls at the school.

<h3>Why does the confidence interval did give convincing evidence?</h3>

The interval is one that gave a good convincing evidence, based on the fact that the number 0 stands as NO difference ( (girls boys) and thus it is = 0 ).

It is also not not included in this interval and as such, it can mean that the difference in the mean number of shoes owned by girls and the mean number of shoes owned by boys is 0 .

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3 0

2 years ago

The access code for a card security system consist of four digits the first digit cannot be 4 and the last digit must be odd. Ho

Deffense [45]

Different codes for access code which are available are: 4000

_ _ _ _

1 2 3 4

1st blank can be filled with the following possibilities, here the conditions are:

1)The first digit cannot be 4

2)The first digit cannot be 0 also since it makes the access code 3 digits hence

From 1 to 9 except 4 there are 8 possible ways to fill that blank

2nd blank can be filled with any number between 0 to 9 in 10 possible ways

3rd blank can be filled with any number between 0 to 9 in 10 possible ways

4th blank can be filled with any odd numbers between 0 to 10 - 1,3,5,7,9

<u>8</u> <u>10</u> <u>10</u> <u>5</u> = 8 x 10 x 10 x 5 = 4000

Hence to conclude that 4000 available codes are there for the access security card

To know more about permutations and combinations please follow this link

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5 0

1 year ago

What is the answer to this riddle?

olasank [31]

Christopher columbus is it?

8 0

3 years ago

The long-run aggregate supply curve will shift to the right if quizlet net exports decrease

pantera1 [17]

The long-run aggregate supply curve will shift to the right if a given economy experiences technological advancements.

<h3>What is the aggregate supply curve?</h3>

The aggregate supply curve is a graphical representation that makes reference to all processes that add value to the productive chain.

The aggregate supply curve is mainly influenced by technological inputs that increase productivity.

In conclusion, the long-run aggregate supply curve will shift to the right if a given economy experiences technological advancements.

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7 0

2 years ago

If a person takes 30 ml of vinegar a day and the molarity of the vinegar is 0. 84 m then how many grams of acetic acid (hc2h3o2

babunello [35]

The mass of the acetic acid is 1.512 g.

<h3 /><h3>What is Molarity?</h3>

molarity is the concentration of a substance in mol per dm³

From the question,

The number of moles contained in the 30 mL vinegar is

n = (0.84×30)/1000
n = 0.0252 mol.

the molar mass of vinegar is calculated below.

m.m of (HC₂H₃O₂) = [1+(12×2)+(1×3)+(16×2)]
m.m = (1+24+3+32]
m.m = 60 g/mol.

To calculate the mass of acetic acid, we use the formula below.

R.m = n×m.m............. Equation 1

Where

R.m = mass of acetic acid.

Substitute these values into equation 1

R.m = (0.0252×60)
R.m = 1.512 g.

Hence, The mass of the acetic acid is 1.512 g.

Learn more about molarity here: brainly.com/question/20383725

8 0

3 years ago