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
igomit [66]
3 years ago
11

Nitrates are organic compounds that are a main ingredient in fertilizers. When those fertilizers run off into streams, the nitra

tes can have a toxic effect on fish. An ecologist studying nitrate pollution in two streams measures nitrate concentrations at 42 places on Stony Brook and 42 places on Mill Brook. The parallel dotplots display the data. Which of the following is a correct comparison of the distributions of nitrate concentration in these two streams?
Both distributions appear to be right-skewed.

Neither distribution of streams has any apparent outliers.

The distribution of nitrate concentration for Mill Brook is more variable than the Stony Brook distribution.

The distribution for Mill Brook is single-peaked while the distribution for Stony Brook has two peaks.

The median nitrate concentration for the two streams are about the same.
Mathematics
1 answer:
irina1246 [14]3 years ago
6 0
duknti, oitebkivs, iriinsrion and ehow
tnks
You might be interested in
at a restaurant the ratio of kids meals sold to adults meal was 5:4. if there were 20 kids meals sold, what is the combined amou
seraphim [82]
I would set up a proportion:

\frac{20}{x}=\frac{5}{4}

The proportion basically says, "if there are 5 kids meals for every 4 adult meals, that means 20 kids meals would mean x adult meals."  Just cross multiply and then solve for x:

\frac{20}{x}=\frac{5}{4}\\5x=80\\x=16

That means there are 20 kids meals sold and 16 adult meals sold, so the result is:

36 meals in total.
5 0
3 years ago
Read 2 more answers
Scores on the GRE.
Bogdan [553]

Answer:

Kindly check explanation

Step-by-step explanation:

Verbal:

Score, x = 560

Mean, m = 460

Standard deviation, s = 132

Quantitative :

Score, x = 740

Mean, m = 452

Standard deviation, s = 140

a)

Verbal :

X ~ N(460, 132)

Quantitative :

X ~ N(452, 140)

(b)

What is her Z score on the Verbal Reasoning section? On the Quantitative Reasoning section? Draw a standard normal distribution curve and mark these two Z scores.

Zscore = (x - m) / s

Verbal :

Zscore = (560 - 460) / 132 = 0.758

Quantitative :

Zscore = (740 - 452) /140 = 2.057

(c.)

He has a higher standardized score in the quantitative than the verbal score.

(d.)

The Zscore shows that he performed better in the quantitative reasoning than verbal.

(e) Find her percentile scores for the two exams.

(f) What percent of the test takers did better than her on the Verbal Reasoning section? On the Quantitative Reasoning section?

Verbal :

Score greater than 560

P(x > 560) :

Z = (560 - 460) / 132 = 0.758

P(Z > 0.758) = 0.22423 = 22.4%

Quantitative :

Score greater than 740

P(x > 740) :

Z = (740 - 452) / 140 = 2.057

P(Z > 0.758) = 0.0198 = 1.98%

8 0
3 years ago
Karen surveys a group of people to find out how many hours, in total, they had worked in the previous week. Her results are summ
Fantom [35]
Bro? There’s nothing or no evidence
7 0
3 years ago
Read 2 more answers
HELPPPPPPPPPPPPPP PLEASE
tatuchka [14]

Answer:

r=d/t

Step-by-step explanation:

just divide by t to isolate r

4 0
3 years ago
Read 2 more answers
3: Please help. Circle C has its center at (9,0) and a point is on the circle at A(8,6).
valina [46]

Answer:

The correct answer is The equation (9−8)2+(0−6)2=(9−10)2+(0+7)2 is a true statement, so P is on ⨀C.

4 0
3 years ago
Other questions:
  • What is the effect on the graph of the parent function f(x) = x when f(x) is replaced with f(x) + 3?
    11·2 answers
  • How much sleep does a jaguar get in 1 year? The amount of sleep is ________ hours.
    5·1 answer
  • The intersection of two streets forms a parallelogram. One street is 40 feet wide. The height of the parallelogram formed is 25
    11·2 answers
  • history on our 50% of 32 less than a hundred greater than 100 but less than 150 or greater than 150 ​
    7·1 answer
  • ASAP — PLS HELP OUT <br> WILL MARK BRAINLIEST AND GIVE A LOT OF POINTS
    9·1 answer
  • Obtenha os zeros da função <br><img src="https://tex.z-dn.net/?f=f%28x%29%20%3D%202x%20%20%7B%7D%5E%7B2%7D%20%20%2B%2032" id="Te
    5·1 answer
  • Find the inverse of the given function. f(x) = 7x – 4​
    8·1 answer
  • HELP MEEE PLEASEEEEE!!!!! I NEED HELPPP!!
    14·2 answers
  • Please answer this due at 11:59
    11·1 answer
  • Algebra 1 Chapter 5 test
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!