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
just olya [345]
3 years ago
6

Determine what type of observational study is described. Explain. Vitamin D is important for the metabolism of calcium and expos

ure to sunshine is an important source of vitamin D. A researcher wanted to determine whether osteoperosis was associated with a lack of exposure to sunshine. He selected a sample of 250 women with opteoperosis and an equal number of women without osteoperosis. The two groups were matched in other words they were similar in terms of age, diet, occupation, and exercise levels. Histories on exposure to sunshine over the previous twenty years were obtained for all women. The total number of hours that each woman had been exposed to sunshine in the previous twenty years was estimated. The amount of exposure to sunshine was compared for the two groups. a.cohort; Individuals are observed over a long period of time. b.cross-sectional; Information is collected at a specific point in time. c.retrospective; Individuals are asked to look back in time Question 15 4 pts
Mathematics
1 answer:
ICE Princess25 [194]3 years ago
3 0

Answer:

thats too long to read but good luck!

Step-by-step explanation:

You might be interested in
1 question please help thanks
Serggg [28]

Answer: 2, -3

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
3.5x-81=360 <br> Please help this is due tomorrow
postnew [5]

Answer:

Step-by-step explanation:

so what your gonna do is you are going to add 81 to 360 and then sum it up. after you are going to divide it by 3.5.

This might be wrong but there is always a point where you have to try :)

3 0
2 years ago
Read 2 more answers
Identify the slope and y-intercept from the following equations.
Maksim231197 [3]

Answer:

y=3x - 1

M=3

B=1

y=1/2 X - 5

M=1/2x

B=5

8 0
3 years ago
A. Use composition to prove whether or not the functions are inverses of each other. B. Express the domain of the compositions u
Kryger [21]

Given: f(x) = \frac{1}{x-2}

           g(x) = \frac{2x+1}{x}

A.)Consider

f(g(x))= f(\frac{2x+1}{x} )

f(\frac{2x+1}{x} )=\frac{1}{(\frac{2x+1}{x})-2}

f(\frac{2x+1}{x} )=\frac{1}{\frac{2x+1-2x}{x}}

f(\frac{2x+1}{x} )=\frac{x}{1}

f(\frac{2x+1}{x} )=1

Also,

g(f(x))= g(\frac{1}{x-2} )

g(\frac{1}{x-2} )= \frac{2(\frac{1}{x-2}) +1 }{\frac{1}{x-2}}

g(\frac{1}{x-2} )= \frac{\frac{2+x-2}{x-2} }{\frac{1}{x-2}}

g(\frac{1}{x-2} )= \frac{x }{1}

g(\frac{1}{x-2} )= x


Since, f(g(x))=g(f(x))=x

Therefore, both functions are inverses of each other.


B.

For the Composition function f(g(x)) = f(\frac{2x+1}{x} )=x

Since, the function f(g(x)) is not defined for x=0.

Therefore, the domain is (-\infty,0)\cup(0,\infty)


For the Composition function g(f(x)) =g(\frac{1}{x-2} )=x

Since, the function g(f(x)) is not defined for x=2.

Therefore, the domain is (-\infty,2)\cup(2,\infty)



8 0
3 years ago
Factor by finding the GCF:<br> 8x-10
lys-0071 [83]

Answer:

The GCF is 2

Step-by-step explanation:

Hope this helps!!

3 0
3 years ago
Read 2 more answers
Other questions:
  • What is 4/3s-3≥5-4 please help :).
    13·1 answer
  • It takes 2 gallons of milk to make a batch of ice cream. How many gallons of milk does it take to make 15.2 batches of ice cream
    9·1 answer
  • a patients daily fluid intake increased from 120mL to 350 mL from monday to tuesday. what percent of increase was thus
    9·1 answer
  • What is 3/16 as a decimal ?
    13·2 answers
  • Which operations would create an equivalent system of equations with opposite like terms?
    10·2 answers
  • I need help is it A b C or D
    11·1 answer
  • Pls help 10 pts<br> no links
    9·1 answer
  • PLEASE HELPPLEASEEEEEE
    9·1 answer
  • the price for one book mark at the fair is 2.15 . which equation best represents y, the total cost of x bookmark at this fair
    11·1 answer
  • 60 twelve minus 13 twelve
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!