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kow [346]
3 years ago
7

When evaluating an observational study, the four factors that should be reviewed are

Mathematics
1 answer:
Zinaida [17]3 years ago
7 0
They are
1. Background
2. Methods
3. Results
4. Conclusions
Hope this helped
You might be interested in
Evaluate ∫ xe2x dx. 1 2 3x A./xe +C 6 B.1/xe2x-1/ xe2x+C 22 C.1/xe2x-1/ e2x+C 24 1 2 1 4x D./x-/e +C 28
Dafna1 [17]
The answer is (1/2)xe^(2x) - (1/4)e^(2x) + C

Solution:
Since our given integrand is the product of the functions x and e^(2x), we can use the formula for integration by parts by choosing
     u = x
     dv/dx = e^(2x)

By differentiating u, we get
     du/dx= 1
By integrating dv/dx= e^(2x), we have
     v =∫e^(2x) dx = (1/2)e^(2x)

Then we substitute these values to the integration by parts formula:
     ∫ u(dv/dx) dx = uv −∫ v(du/dx) dx 
     ∫ x e^(2x) dx = (x) (1/2)e^(2x) - ∫ ((1/2) e^(2x)) (1) dx
                          = (1/2)xe^(2x) - (1/2)∫[e^(2x)] dx
                          = (1/2)xe^(2x) - (1/2) (1/2)e^(2x) + C
where c is the constant of integration.

Therefore, 
     ∫ x e^(2x) dx = (1/2)xe^(2x) - (1/4)e^(2x) + C
7 0
3 years ago
Use the point-slope equation to identify the slope and the coordinates of a point
ioda

Answer:

see explanation

Step-by-step explanation:

The equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b) a point on the line

y - 4 = \frac{1}{2}(x - 1) ← is in point- slope form

with slope m = \frac{1}{2}

and (a, b) = (1, 4 ) ← point on the line

7 0
3 years ago
Read 2 more answers
The square of a number minus six times a number equals negative five.
olga_2 [115]

Answer:

x² - 6x = -5

x = {1, 5}

Step-by-step explanation:

The square of a number minus six times a number equals negative five.

x² - 6x = -5

Add 5 to both sides

x² - 6x + 5 = 0

Factor

(x - 1)(x - 5) = 0

x = {1, 5}

3 0
3 years ago
Read 2 more answers
A company that makes hair-care products had 7,000 people try a new shampoo. Of the 7,000 people, 56 had a
Leona [35]

Answer:

0.8

Step-by-step explanation:

i believe it would be 56/7000 and you multiply your answer 0.008 by 100 so 0.8 had a mild reaction

3 0
2 years ago
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Interest after 1 year:
jasenka [17]

which class is this because I am in 7th class so that's why I can't give

5 0
2 years ago
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