Answer:
60 degrees
Step-by-step explanation:
BWA is an isosceles triangle, meaning that BW and WA are equal in length.
Thus, we have that ABW and WAB are congruent to each other.
ABC is a complementary angle, so ABW and CBD add up to 90 degrees.
ABW is 30 degrees, so we have 30 degrees+ CBD=90 degrees.
Subtracting thirty degrees from both sides we get CBD=60 degrees.
Hope this helps!
Answer:
the answer 0
Step-by-step explanation:
Answer:
Brand 1 Brand 2 Difference
37734 35202 2532
45299 41635 3664
36240 35500 740
32100 31950 150
37210 38015 −805
48360 47800 560
38200 37810 390
33500 33215 285
Sum of difference = 2532+ 3664+740+150 −805+ 560 +390 +285 = 7516
Mean = 
Mean = 
a) d= 939.5


=1441.21
b)SD= 1441.21
c)Calculate a 99% two-sided confidence interval on the difference in mean life.
confidence level =99%
significance level =α= 0.01
Degree of freedom = n-1 = 8-1 =7
So, 
Formula for confidence interval 
Substitute the values
confidence interval 
confidence interval
to 
Confidence interval
to 
Answer:
0.012
Step-by-step explanation:
Have a good day.