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Talja [164]
3 years ago
12

WILL GIVE BRAINLIST SOON AS I CAN. please help.​

Mathematics
1 answer:
VARVARA [1.3K]3 years ago
5 0

Answer:

201.2

Step-by-step explanation:

area= s^2n

        -----------  ( 180)

         4+9        ---------

                          ( n )

Area equals S squared n over four plus nine times ( 180 over n )

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A geologist examines 6 seawater samples for lead concentration. The mean lead concentration for the sample data is 0.903 cc/cubi
Gnesinka [82]

Answer:

Step-by-step explanation:

We want to determine a 95% confidence interval for the mean lead concentration of sea water samples

Number of samples. n = 6

Mean, u = 0.903 cc/cubic meter

Standard deviation, s = 0.0566

For a confidence level of 95%, the corresponding z value is 1.96. This is determined from the normal distribution table.

We will apply the formula

Confidence interval

= mean +/- z ×standard deviation/√n

It becomes

0.903 +/- 1.96 × 0.0566/√6

= 0.903 +/- 1.96 × 0.0566/2.44948974278

= 0.903 +/- 0.045

The lower end of the confidence interval is 0.903 - 0.045 =0.858

The upper end of the confidence interval is 0.903 + 0.045 =0.948

Therefore, with 95% confidence interval, the mean lead concentration of the sea water is between 0.858 cc/cubic meter and 0.948 cc/cubic meter

7 0
3 years ago
(1)/(2)(8y-4)=(3)/(4)(16-8y)
Talja [164]

Answer:   y=7/5

Hope this helps

7 0
3 years ago
Suppose a triangle has 3 sides, 3, 4, 6 which of the following must be true
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Answer:

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Step-by-step explanation:

A 3-4-5 triangle is a right triangle, so this one, with its longer longest side, is an obtuse triangle. It is not a right triangle.

___

3, 4, 5 is one of the first Pythagorean triples that you learn:

  3² + 4² = 5²

These are the side lengths of the smallest right triangle with integer sides. It is worthwhile to remember. This triple is used not only in many math problems (such as this one), but also in real life when it is useful to lay out a right angle.

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Aleksandr-060686 [28]
60 min in one hour so 60+60+30=150.
150 divided 50 mins = 3 days (50+50+50=150)
3 0
4 years ago
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