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iogann1982 [59]
2 years ago
11

A supervisor records the repair cost for 17 randomly selected VCRs. A sample mean of $68.83 and standard deviation of $12.17 are

subsequently computed. Determine the 80% confidence interval for the mean repair cost for the VCRs. Assume the population is approximately normal.
Step 1 of 2: Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.
Mathematics
1 answer:
amid [387]2 years ago
5 0

Answer:

27

Step-by-step explanation:

im smart

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Evaluate –3ab when a = –2 and b = –5.
UNO [17]
Simple.....

you have:

-3ab--->> a=-2  b=-5

Or-->>

-3(-2)(-5)

Simplify....

-3(10)

-30

Thus, your answer.
5 0
3 years ago
WIll give brainliest Use the information given to answer the question.
MaRussiya [10]

Answer:

x²-12x+36

Step-by-step explanation:

an expression in the form (a-b)² is expanded to the form a²-2ab+b²

you can also expand it to (x-6)×(x-6) then multiply the first term by the first the outer term by the outer term the inner term by the inner term and the last term by the last term (foil)

the first terms are x and x = x² the outer terms are x and -6 = -6x the inner terms are also x and -6 = -6x

the last terms are 6 and 6 = 36

adding all the four products =

x²-12x+36

7 0
2 years ago
A⋅a/\2⋅a/\3=?? I need help ASAP
wolverine [178]

Answer:

a^6

Step-by-step explanation:

a^1 * a^2 * a^3 = 1+2+3(add all power when same variable)

a^6

7 0
3 years ago
A diver descends to a location of -50 1 over 4 meters relative to the surface of the water. He then descends another 10 1 over 2
Yanka [14]

Answer:

-60\frac{3}{4} meters.

Step-by-step explanation:

To find diver's final location relative to the surface of water we will subtract  10\frac{1}{2} from -50\frac{1}{4} because diver dives away another 10\frac{1}{2} from his previous location of -50\frac{1}{4}.

-50\frac{1}{4} -10\frac{1}{2}

Now we will convert our mixed fraction into improper fraction and then we will find a common denominator.

\frac{-201}{4} -\frac{21}{2} =\frac{-201-42}{4}

=\frac{-243}{4}

Now let us convert our answer in mixed fraction.

=\frac{-243}{4}=[tex]-60\frac{3}{4}[/tex]

Therefore, diver's final location relative to the surface of the water is -60\frac{3}{4} meters.

3 0
3 years ago
Read 2 more answers
Should the dress code for Pizza Hut employees be enforced? ( BIASED OR UNBIASED)
Sholpan [36]

Answer:

yes

Step-by-step explanation:

Having a dress code is very important for the workers because it makes it much easier to spot them and get the help you food. Plus it keeps the hair out of your food soooo-

++

6 0
2 years ago
Read 2 more answers
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