Answer: 20% of 248.00 is the same as 10% + 10% of 248 and the answer is 49.6
Obtuse angle
Which is a angle between 90 and 180 degrees. Add all of them up you’ll get 105 which is in between 90 and 180.
The sides of a 30, 60, 90 triangle is a, 2a, a
Since the give two sides are 7
and 14, we can say the a=7. Hence the long leg is 7
Answer:
the population means are known the population variances are assumed equal but unknown
Step-by-step explanation:
If σ1= σ2 (= σ) but unknown , then the biased pooled or combined estimate of the common variance σ² ( the term common variance means that each population has the same variance ) is given by
Sp²= (n1-1) s1² + (n2-1) s2²/ n1+ n2- 2
So first assumption is correct.
When the population variances are assumed unequal and unknown
If σ1 ≠ σ2 but unknown
we use the sample estimates s1 and s2 to compute the standard error of the difference between the means.
S(x1`- x2`) = √s1²/ n1 + s2²/n2
So this is does not apply here.
