Identify the solution set of each equation or inequality using the given replacement set

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

If 3 apples cost $6 how much would 1 Apple cost

AnnyKZ [126]

Divide 6 by 3
3 goes into 6, 2 times so one apple costs $2

8 0

3 years ago

Read 2 more answers

(PICTURE) Can someone please help me out Im reporting trolls. Marking brainliest

Goshia [24]

Answer:

smart dot company would be c=.50t+12

communication plus would be c=2.50t

Step-by-step explanation:

smart dot starts with $12 a month and adds $0.50 for each hour of internet use. communication plus has no starting fee so it just adds $2.50 for each hour of internet use.

So then for the table you would put the number given for time in for the letter t and find what c would be. This would then find your cost for that amount of hours. To get you started smart dot company starts off with 0 hours so put that in for t being c=0.50(0)+12 and c=12. Communication plus also starts with 0 so it would be c=2.50(0) and c=0

Then you graph once you have both values you can graph having x=time and y=cost

Let me know if this helps!

4 0

3 years ago

i need info on 3 cars, including make, model and selling price. then i need each cars depreciation rate. ill give brainliest. (p

myrzilka [38]

Answer:

1) Mercedes Benz A class which is $ 33495 (starting),

made in Germany

https://www. truecar .com/prices-new/mercedes - benz/

It has depreciation 6% in the first three years https:// www .themoneycalculator .com/vehicle-finance/calculators/car-depreciation-by-make-and-model/MERCEDES-BENZ/A_CLASS/

2) Ferrari 458 $35,563

https:// www. ferrari. com/en-EN/auto/458-speciale

Ferrari 458 models depreciate 29% in the first three years

https://www. themoneycalculator .com/vehicle-finance/calculators/car-depreciation-by-make-and-model/FERRARI/458/

3)Honda Civic $20,950

https:// automobiles .honda .com/civic

depreciation is 34%

https:// www. themoneycalculator .com /vehicle-finance/calculators/car-depreciation-by-make-and-model/HONDA/CIVIC/

3 0

3 years ago

One base of a triangular prism has two sides that are 15 inches wide and 10 inches long what is the possible length for the thir

Tcecarenko [31]

18.03 inches
Put the dimensions into the pythagorean theorem, that will give you the answer.

7 0

3 years ago