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
OLga [1]
2 years ago
7

The average amount of ozone in several cities across Pennsylvania was correlated with the average number of asthma cases in thos

e cities. What type of study is this
Mathematics
1 answer:
bekas [8.4K]2 years ago
3 0

Answer:

Ecological study

Step-by-step explanation:

You might be interested in
Consider the following function. f(x) = |x − 9| Find the derivative from the left at x = 9. If it does not exist, enter NONE. -1
nydimaria [60]

Answer with Step-by-step explanation:

We are given that

f(x)=\mid x-9\mid

f(x)=-(x-9) when x<9

f(x)=x-9 when x\geq 9

LHD

\lim_{x\rightarrow 9-}f'(x)

=-\lim_{x\rightarrow 9-}(x-9)=-1

RHD

\lim_{x\rightarrow 9+}f'(x)

=\lim_{x\rightarrow 9+}(x-9)=1

LHD\neq RHD

Hence, the function is not differentiable at x=9

8 0
3 years ago
Determine if the table is proportional or nonproportional
Step2247 [10]

The answer is nonproportional.

8 0
3 years ago
Read 2 more answers
By copying and completing the working below, work out 3 + 1 16 Give your answer as a fraction in its simplest form.
Ksenya-84 [330]

Answer:

Assuming the question is:  3 + 1 16  [I see no "working below."

Step-by-step explanation:

3 + 1 16

48/16 + (16/16 + 1/16)  [Make all numbers into fractions using 16 as the denominator.  E.g. 48/16 = 3.

Add:  48/16 + (16/16 + 1/16)

  (48+16+1)/16

=63/16

[Also equal to 3 15/16]

7 0
3 years ago
This question is WORTH 15 POINTS
masha68 [24]
3x² - 33x - 180 = 0
3(x² - 11x - 60) = 0
3(x² - 15x + 4x - 60) = 0
3(x + 4)(x - 15) = 0
3(x - 4) = 0 or x - 15 = 0
3x - 12 = 0     <u>  + 15  + 15</u>
<u>    + 12 + 12</u>           x = 15
       <u>3x</u> = <u>12</u>
        3      4
         x = 3

The answer is equal to H.15 and E. 4.
8 0
4 years ago
How to write Q={1,2,3,5} in set builder form?<br>​
blagie [28]

Answer:

{x:x is a natural number less than 6}

Step-by-step explanation:

Set builder is a type of set where we have to represent any value inside a set

by using the variable x, v, b, a, c etc.

Eg A={1,2,3,4}

For eg {a: a is a natural number less than 5}

8 0
2 years ago
Other questions:
  • Betty Donahue is choosing between two fitness centers. Center A charges $375 per year for unlimited use of all facilities. Cente
    11·2 answers
  • A+b/a-b =5/3 what are the following ratios? a+b/a
    8·1 answer
  • What is the answer for <br>9=81×
    9·2 answers
  • The results from spinning a spinner multiple times are given in the table below.
    15·2 answers
  • A baseball stadium has 45,000 seats. If tickets have been bought for 5/8 of the seats for the next game, how many seats are stil
    7·1 answer
  • Assume that the readings on the thermometers are normally distributed with a mean of 0 and standard deviation of 1.00C. A thermo
    6·1 answer
  • How would you describe the two lines ? 4y=-5x+12 y=4/5x-8 A) parallel
    6·1 answer
  • In the figure at the right what is m &lt; 1 if m &lt; 3= 70 degrees
    11·1 answer
  • Find the cost of sending 25 text messages.<br> Text messages- 5,6,7<br> Cost- 2.5,3,3.5
    9·2 answers
  • ann works in a supermarket for $10.00 per hour. she received a raise to $12.00 . What is the percent of change in her hourly wag
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!