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o-na [289]
3 years ago
6

PLEASE HELP!!!!Ned wrote the following statement:

Mathematics
2 answers:
lys-0071 [83]3 years ago
4 0
I think is the second choice!!!
 <span />
8_murik_8 [283]3 years ago
4 0
Your Answer Would End Up Being:  <span>Ned is incorrect, because the triangle described cannot be drawn with the given information.</span>
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The life of a semiconductor laser at a constant power is normally distributed with a mean of 7,000 hours and a standard deviatio
Scrat [10]

This question not incomplete

Complete Question

The life of a semiconductor laser at a constant power is normally distributed with a mean of 7,000 hours and a standard deviation of 600 hours. If three lasers are used in a product and they are assumed to fail independently, the probability that all three are still operating after 7,000 hours is closest to? Assuming percentile = 95%

Answer:

0.125

Step-by-step explanation:

Assuming for 95%

z score for 95th percentile = 1.645

We find the Probability using z table.

P(z = 1.645) = P( x ≤ 7000)

= P(x<Z) = 0.95

After 7000 hours = P > 7000

= 1 - P(x < 7000)

= 1 - 0.95

= 0.05

If three lasers are used in a product and they are assumed to fail independently, the probability that all three are still operating after 7,000 hours is calculated as:

(P > 7000)³

(0.05)³ = 0.125

7 0
3 years ago
15 POINTS!! HELP ME PLZ!!!
Mrrafil [7]

The answer is C: systematic sampling

8 0
3 years ago
Read 2 more answers
85 pts!!!! Just write the answers or something related to the answer. It’s to help others who need it!!
olasank [31]

m<CAE = 90: definition of perpendicular

p.s. ty for this!

4 0
2 years ago
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A right triangle has side lengths 5, 12, and 13 as shown below. Use these lengths to find Cos B, tan B, and Sin B
DochEvi [55]
This should do it...hope it helps!!

7 0
2 years ago
Sams brother is 7 years older than Sam. His mother is 4 less than 3 times sams age. Their combined age is 63. How old isn’t Sam,
statuscvo [17]

The answer is 14. This is because 63=3+x+3x-4. Then You just subtract it and then you get 64=4x. Then you just divide it and then you get x=16.

4 0
3 years ago
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