1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
bagirrra123 [75]
3 years ago
11

The water department checks the city water supply on a regular basis for contaminants such as xylenes. the water department take

s 200 samples and estimates that the concentration of xylenes in your drinking water is 3.5 ppb (parts per billion), with a standard deviation of 0.2 ppb.
assuming the samples were random and unbiased, how much confidence can you have in this data?

Mathematics
1 answer:
Novosadov [1.4K]3 years ago
6 0

Answer:

Its A

Step-by-step explanation:

You might be interested in
(5v +37v2 - 80v - 69)/(v+9)
valina [46]

Answer:

-67-80v

Step-by-step explanation:

hope this helps!

3 0
3 years ago
If you never pulled your money out of your account from the company in Question #4 and let it grow to age 60, how much money wou
Mariulka [41]

Answer:

1

Step-by-step explanation:

8 0
2 years ago
I need help i need to get this right please i begggggg you<br>i need help ASAP
Flauer [41]
Please say brainliest.

The answer is yes.

Plug 4 in for the value of n so you have 4+8 is less than it equal to 13. And since 12 is less than 13 it is true, and a solution to the inequality.
4 0
3 years ago
6
Mnenie [13.5K]

Explanation: A diagonal of a rectangle cuts the rectangle into 2 right triangles with sides equal to the sides of the rectangle and with a hypotenuse that is the diagonal. All you need to do is use the pythagorean theorem: where a and b are the sides of the rectangle and c is the length of the diagonal.

3 0
2 years ago
If cos θ = -2/5 and tan θ &gt; 0, what is the value of sin θ? Answer Choices: a) the negative square root of 21 b) the negative
padilas [110]

Answer:

I think it is A

Step-by-step

5 0
2 years ago
Other questions:
  • What is your monthly if you make 13,500 a year
    13·2 answers
  • II. Using Radians to Measure Arcs and Angles
    15·1 answer
  • What is the equation of the line that passes through (-2,-3) and is perpenicular to 2X -3Y= 6
    15·1 answer
  • One of the fastest recorded speeds of a turtle while swimming is 9 m/s. Approximately, what is this speed in kilometers per hour
    15·2 answers
  • Is the equation 8x12x5 =- 8x(12x5) an associative property or distributive property equation?
    14·2 answers
  • Give a step by step instructions
    11·1 answer
  • Pls help me im confused
    12·1 answer
  • PLZ HELP MEH PLZ :::
    8·2 answers
  • Helpppppp$$$!!!!!!!!!!!!!!!!! Plz
    12·1 answer
  • Bridgette measured an Italian restaurant and made a scale drawing. The scale of the drawing was 8 millimeters: 5 meters. The res
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!