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Alinara [238K]
3 years ago
15

Help please and explain how you did it

Mathematics
2 answers:
Harrizon [31]3 years ago
5 0

1 yard = 3 feet

10 yards = 30 feet (multiply both sides by 10)

------------------

1 yard = 3 feet

2/3 yard = 2 feet (multiply both sides by 2/3)

-------------------

10 yards + 2/3 yard = 30 feet + 2 feet = 32 feet

<h3>The final answer is 32 feet</h3>
jeka57 [31]3 years ago
5 0

Answer: 32 feet

Step-by-step explanation:

We know 1 yard equals 3 feet

Therefore 10 yards × 3 feet = 30 feet

2/3 yards = 2 feet ( 3/3 would be 1 whole yard which is 3 feet.. so 1/3 would be 1 foot, 2/3 is 2 foot)

Add [email protected] 30 ft + 2/3yards @2 ft and you get 32 total ft.

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The cumulative distribution function for exponential distribution is :-

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As per given , we have

Average tread-life of a certain brand of tire :  \lambda=\text{42,000 miles }

Now , the probability that a randomly selected tire will have a tread-life of less than 65,000 miles will be :

P(X\leq 65000)=1-e^{\frac{-65000}{42000}}\\\\=1-e^{-1.54761}\\\\=1-0.212755853158\\\\=0.787244146842\approx0.7872

Hence , the probability that a randomly selected tire will have a tread-life of less than 65,000 miles is 0.7872 .

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3 years ago
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