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Eva8 [605]
3 years ago
9

Subtract.

Mathematics
1 answer:
V125BC [204]3 years ago
5 0
The answer is 37 20/21 hope this helps :)
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Many people feel that the drying of pavement marking paint is much too slow. You spend several days looking for the fastest dryi
slavikrds [6]

Answer:

21

Step-by-step explanation:

Using<em> Simple Random Sampling</em>, we can estimate the sample size by the formula

\bf n=\frac{Z^2S^2}{e^2}

where  

n = sample size

Z = the z-score corresponding to the confidence level 99.5%

S = the assumed standard deviation = 3 seconds

e = margin of error = 2 seconds

<em>It is worth noticing that the higher the confidence level, the larger the sample should be. </em>

The z-score corresponding to a confidence level of 99.5% can be obtained either with a table or the computer and equals

Z = 3.023

Replacing the values in our formula

\bf n=\frac{(3.023)^23^2}{2^2}=20.5616\approx 21

So the size of the sample should be at least 21.

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2 years ago
Nina made 8 withdrawals from
forsale [732]
The total change in her bank account would be $160,

if you multiply 8x$20 you get $160
6 0
2 years ago
$70 shoes, with 6% sales tax
Sergio039 [100]

Answer: $4.20

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Louise measured the perimeter of her rectangular scrapbook to be 156 cm. If the scrapbook is 43 cm wide, how long is the scrapbo
Montano1993 [528]

Answer:

L=35cm

Step-by-step explanation:

Perimeter is 2(L+w)

156cm=2*(43+L)

L=35cm

8 0
3 years ago
Slope -2/3, through (-1,-6) <br><br> What is the equation of the line?
Arturiano [62]

Answer:

Step-by-step explanation:

y + 6 = -2/3(x + 1)

y + 6= -2/3x - 2/3

y + 18/3 = -2/3x - 2/3

y = -2/3x - 20/3

8 0
3 years ago
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