The lifetime of watch batteries follow a normal distribution with mean 100 hours and variance 49 hours. If a battery is chosen at ran- dom, determine above what lifetime does the 80 % largest lifetime of watch batteries lie? (A) 84.7 (B) 93.4 (C) 0.9 (D) 103.64 (E) 94.12 Select one: O A.. O B. . O D.. O E..

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Q: 5 -100 12 8

A: Solve the given

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Q: 8.20+2

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Q: b. N(0)

A: Given,  r→t=sint, t, cost                   ...1

Q: 12 5(.8)0

A: We can solve given problem by using G.P series.

Q: 6.4 3

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A: We know that tan θ=Opposite sideAdjacent sidetan(68)=x21

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Q: ne distance between the points on the gi

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Q: 3) 24 12

A: We can find the value of x as below

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A: The circumference of a circle with radius r is 2πr.

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Q: 4) 37 12

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Q: 12 10 6. X%=

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