One fifth given medicine= 20 people
Placebo therefore= 80 people
Of the ones given medicine 70% (14 people) felt inprovement/ 30% did not (6 people)
Of the placebo group 80% felt improvement (64 people)/ 20% did not (16 people).
You are given that the person chosen felt no improvement so 6+16=22.
Of the 22 the chance of choosing someone from the placebo group is 16...
16/22= 8/11
Answer:
5
Step-by-step explanation:
x^2 - 10x + 16 = 0
factor
(x - 2)(x - 8) = 0
roots
x = {2, 8}
mean of roots
a = (2 + 8) /2
a = 5
Answer:
Example 1.
A square with side lengths of 5.
5*5 = 25.
So the area would be 25 units ^2
Example 2.
A rectangle with a length of 9 and a width of 4
9*4 = 36
So the area is 36 units ^2
Answer:
approximately = 26394.72
Convert between the 2 units.
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Answer:
Because the opposite side is shorter than the hypothenuse
Step-by-step explanation:
- An acute angle is an angle which is less than 
- A right angle is an angle equal to 
- An obtuse angle is an angle which is between
and 
In a right triangle, we have 1 right angle and 2 acute angles.
The sine of an angle in a right triangle is defined as:
(1)
where
At the numerator we have the length of the side opposite to the angle
At the denominator we have the length of the hypothenuse
In a right triangle, the hypothenuse is the longest side of the triangle, so we have

Therefore, the ratio in the eq(1) is less than 1, therefore, the sine of the angle is less than 1. Also, the sine is positive, since the ratio in the equation is a positive number.