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DerKrebs [107]
3 years ago
14

What is a​ case-control study?

Mathematics
1 answer:
Viktor [21]3 years ago
7 0
A case-control study is a type of observational study in which two existing groups differing in outcome are identified and compared on the basis of some supposed causal attribute.
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Work out the value of s
diamong [38]

Answer:

s=6

Step-by-step explanation:

s= 10(1/2)+ -2(1/2)^2

s= 5+ (-1)^2

s= 5+1

s=6

6 0
2 years ago
Read 2 more answers
Help me solve this please
LuckyWell [14K]

9514 1404 393

Answer:

  shaded/square = (50π cm²)/(400 cm²) = π/8

Step-by-step explanation:

The quarter circle has area ...

  A = (1/4)(πr²) = π/4(20 cm)² = 100π cm²

The half-circle has area ...

  A = (1/2)(πr²) = π/2(10 cm)² = 50π cm²

Then the area of the shaded portion is ...

  shaded = 100π cm² -50π cm² = 50π cm²

__

The area of the square is ...

  A = s² = (20 cm)² = 400 cm²

Then the ratio of interest is ...

  shaded/square = (50π cm²)/(400 cm²) = π/8

5 0
3 years ago
Solve the trigonometric equation for all values 0 &lt; x &lt; 2pi<br> sec x – 1= 0
Margarita [4]

Answer: x= pi

Step-by-step explanation:

6 0
3 years ago
I took notes and went back through the lesson but I can't get it. Help, please!!!
aliina [53]

Answer:

\/

Step-by-step explanation:

▪Picture 1. x = 28

\frac{x}{42}  =  \frac{10 + x}{57} \\ 42(10 + x) = 57x \\ 420 + 42x = 57x \\  \frac{  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: - 42x =  - 42x}{ \frac{420}{15}  =  \frac{15x}{15} }   \\  \\ 28 = x

-

▪Picture 2. I don't know what in trying to solve.

▪Picture 3.

•ABC = 50

•DEF = 95

•GHI = 65

•JKL = 55

▪Picture 4. I dont know how to do that

4 0
3 years ago
A team plays 120 matches a year. In its first year the team wins 45% of its matches. The 2nd year ,the team wins 55 % . How many
prisoha [69]

Answer:they win 12 more matches in the second year

Step-by-step explanation:

Each year, the team plays a total of 120 matches. In its first year the team wins 45% of its matches. This means that the total number of matches that the team won in the first year is

45/100/× 120 = 54

The 2nd year ,the team wins 55% out of 120 matches. This means that the total number of matches that the team won in the second year is

55/100/× 120 = 66

Number of matches for the second year - number of matches for the first leg is 66 - 54 = 12

7 0
3 years ago
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