Unfortunately, arsenic occurs naturally in some ground watert. A mean arsenic level of u- 8.0 parts per billion (ppb) is considered safe for agricultural use. A well in Texas is used to water cotton crops. This well is tested on a regular basis for arsenic. A random sample of 41 tests gave a sample mean of x = 6.9 ppb arsenic, withs- 2.7 ppb. Does this information indicate that the mean level of arsenic in this well is less than 8 ppb? Use a = 0.01.

Q: +2 S₁² S²3²¹ y²e²dxdy = f₁² y²dy ſ² e² dx

A: Given double integration ∫12∫34y2exdxdy

Q: 3Cant understand this, please  Write on paper and write the question too so I can print

A:

Q: Can I get help with d please as $1881 is incorrect

A: GivenThe competitor's bid x is a random variable uniformly distributed between $10,300 and $15,300.…

Q: That's not the correct answer.  Choice D is the answer.

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Q: what is the solution

A: The series diverges.

Q: 1. Simplify. (6-2)³ - (5 +5²) O-14 -32 34 5

A: The given expression        6-23-5+52

Q: This was not the correct answer, could you please try again and get back to me?

A:

Q: What are the values of a and b?

A: To find the value of a and b for the exponential function G(x) = a b(x-2) + c, we need to use the…

Q: This answer is wrong

A:

Q: I need answer for the second question pl

A: s = 10 old reliability = probability of passing = 0.66 The confidence Interval is given as: CI =…

Q: can you list the solution as  1 ,2 ,3 ,4 so i can understand and write the answers

A: can you list the solution as  1 ,2 ,3 ,4 so i can understand and write the answers

Q: Determine whether the scatter diagram indicates that a linear relation may exist between the two…

A: The Negative and positive correlation are determined below as follows:   Positive correlation: when…

Q: Need help solving, thought I knew how to help my son but got myself confused.

A: By using surface area formula, we calculate the required surface area.

Q: can you please rewrite the answer  ? I cannot understand the writing . Thanks

A:

Q: Can you check and make sure this is correct? If not show me the answer and how it was done please

A: To find the correct option

Q: When I checked it says the answer is

A: The solution is given below :

Q: 9. For n = 1,..,n, let X, be independent r.v.'s such that %3D P(X,=1)= p,, P(X,=0)=1- p,- Under what…

A: Hello! As you have posted the different questions, we are answering the first question (9). In case…

Q: Im not sure if this answer is correct can you double check

A:

Statements and Logic

Logic is the analysis of general patterns of thoughts without regard to any specific sense of context.