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Fed [463]
3 years ago
14

Please help! I will mark as brainliest. <3

Mathematics
1 answer:
mafiozo [28]3 years ago
5 0
In interval notation it should be [6, ∞)
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Suppose that the useful life of a car battery, measured in months, decays with parameter 0.03 . We are interested in the life of
scZoUnD [109]

Answer:

a) X ~ e(0.03)

b) μ = 100/3

c) \sigma = 100/3

d) A battery is expected to last 100/3 months (33 months and 10 days approximately).

e) For seven batteries, i would expect them to last 700/3 months (approximately 19 years, 5 months and 10 days).

Step-by-step explanation:

a) The life of a battery is usually modeled with an exponential distribution X ~ e(0.03)

b) The mean of X is μ = 1/0.03 = 100/3

c) The standard deviation is \sigma = 1/0.03 = 100/3

d) The expected value of the bateery life is equal to its mean, hence it is 100/3 months.

e) The expected value of 7 (independent) batteries is the sum of the expected values of each one, hence it is 7*100/3 = 700/3 months.

4 0
3 years ago
Please please help<br><br> ‼️WILL MARK BRAINLIEST‼️<br><br> 10 Points
asambeis [7]
B is the right answer.
4 0
3 years ago
A map has a scale of 1/2 inch to 4 miles. The shortest distance between two cities on the map measures 8 inches. If d represents
azamat
The answer would be C because for every 1 inch, would be 8 miles, so we then multiply the inches by 8 to get to 8 inches, so we then multiply the miles by 8 and we get 64 miles.

D = 64 mi.
5 0
3 years ago
Read 2 more answers
What is the missing number<br> 7 x ( ? x 9) = 63
GrogVix [38]
The ? is 1. 

7*(9*1)=63

Hope this helps!!
6 0
3 years ago
There were a number of people at a conference. After 19 people went home, 23
Travka [436]
There were 42 people at the conference
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3 years ago
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