Please hlep me its ixl
2 answers:
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Answer:
Step-by-step explanation:
Given that the lengths of the sides of a triangle are consecutive integers
Since side cannot be negative we can assume that the sides are
a, a+1 and a+2 where a>0
The largest angle is opposite side a+2 and smallest is angle opposite a
Using sine formula and the given information that the largest angle is twice the smallest angle
we get
Cross multiply to get
Since sin 2A = 2sin A cos A
we get
Answer:
The proportion follows normal distribution,
Mean u = 0.39
standard deviation σ = 0.0218
Step-by-step explanation:
Solution:-
- Lets assume the population proportion ( p ) to be the percentage of adult Americans who believe that marriage is now obsolete.
- We will check for normality:
Lets take, p^ = p (Mean proportion of the distribution)
- The condition of normality,
n*p*( 1 - p ) ≥ 10
Where, n : The sample size taken.
500*0.39*( 1 - 0.39 ) = 500*0.39*( 0.61 )
118.95 ≥ 10
- Hence, with the testing statistics the condition for normality are validated. Hence, the distribution for proportion of adult americans who believe that marriage is now obsolete follows a normal distribution.
- The parameters of the distribution are:
Mean : u = p^ = p = 0.39
Standard deviation σ = =