Answer:
a is, A to c, B E to f, c is g to h I think? 2 a is no, cause it doesn't add up to 90, b is no for the same reason and c is no.
Step-by-step explanation:
i hope I helped I'm iffy on A)c
Answer:
125 - n
Step-by-step explanation:
n is unknown.
Answer:
The probability of failure of both the bulbs is 0.4323.
Step-by-step explanation:
For an exponential distribution the distribution is given by

The value of λ is related to the mean μ as λ=1/μ,
Let us denote the 2 bulbs by X and Y thus the probability distribution of the 2 bulbs is as under

Similarly for the bulb Y the distribution function is given by
Thus the probability for both the bulbs to fail within 1500 hours is

Answer:
The radius is increasing at a rate of approximately 0.044 in/s when the diameter is 12 inches.
Because
the radius is changing more rapidly when the diameter is 12 inches.
Step-by-step explanation:
Let
be the radius,
the diameter, and
the volume of the spherical balloon.
We know
and we want to find 
The volume of a spherical balloon is given by

Taking the derivative with respect of time of both sides gives

We now substitute the values we know and we solve for
:



The radius is increasing at a rate of approximately 0.044 in/s when the diameter is 12 inches.
When d = 16, r = 8 and
is:

The radius is increasing at a rate of approximately 0.025 in/s when the diameter is 16 inches.
Because
the radius is changing more rapidly when the diameter is 12 inches.