Answer:
sorry i cant see the triangle can u describe it to me cause then i can edit my answer and put the right answer
Step-by-step explanation:
please don't be mad i really don't want any one to yell at me please i've already had a bad day so far so please don't yell at me
Answer:
a) X ~ 
b) μ = 100/3
c) 
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 ~ 
b) The mean of X is μ = 1/0.03 = 100/3
c) The standard deviation is 
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.
Answer:
C
Step-by-step explanation:
Option C is the correct answer.
I have no idea what did he do
Answer:
commutative property is C+2+0=C+2
(As a+b=b+a is the law of commutative property of addition )