PLZ HELP ASAP 15 POINTS!!!
2 answers:
Answer:
A. (AB/BC)=(CE/ED)
Step-by-step explanation:
Property of similar triangles :
If two triangles are similar then the corresponding sides are in same proportion,
Here,
By the above property,
Hence, the column prove would be,
Statements Reason
1. AC ⊥ CD
Δ ABC is similar to ΔCED Given
2. (AB/BC)=(CE/ED) Property of similar triangle
3. Slope of AC = -AB/BC Definition of slope
Slope of CD = ED/CE
4. Slope of AC × Slope of CD Multiplying the slopes
= -AB/BC × ED/CE
5. Slope of AC × Slope of CD Substitution property of equality
= -CE/ED × ED/CE
6. Slope of AC × Slope of CD = -1 Simplifying the right side.
Hence, option 'A' is correct.
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Answer:
0.0177 = 1.77% probability that the first defect is caused by the seventh component tested.
The expected number of components tested before a defective component is found is 50, with a variance of 0.0208.
Step-by-step explanation:
Assume that the probability of a defective computer component is 0.02. Components are randomly selected. Find the probability that the first defect is caused by the seventh component tested.
First six not defective, each with 0.98 probability.
7th defective, with 0.02 probability. So
0.0177 = 1.77% probability that the first defect is caused by the seventh component tested.
Find the expected number and variance of the number of components tested before a defective component is found.
Inverse binomial distribution, with
Expected number before 1 defective(n = 1). So
Variance is:
The expected number of components tested before a defective component is found is 50, with a variance of 0.0208.