Answer:
Step-by-step explanation:
Given that n =30, x bar = 375 and sigma = 81
Normal distribution is assumed and population std dev is known
Hence z critical values can be used.
For 95% Z critical=1.96
Margin of error = 
Confidence interval = 375±29
=(346,404)
B) 99% confidence
Margin of error = 2.59*Std error =38
Confidence interval = 375±38
=(337, 413)
C) For 90%
Margin of error = 20
Std error = 20/1.645 = 12.158
Sample size

Atleast 44 people should be sample size.
Well looking at the information in triangle ABC you know
Angle B + Angle C = 180 - 144
so Angle B + Angle C = 36
since the triangles are similar let angle M = x
then Angle C = 2x and angle B = angle M but the similarity postulate
so form an equation
2x + x = 36
solve for x
Hope it helps
Changed both of them to a fraction
Answer:
Either A or C I think, Good luck!!!
Step-by-step explanation:
Step-by-step explanation:
Hope it helps.
Handwriting is a bit poor. So, restraint is advised!
:)