Answer:
C and D
Step-by-step explanation:
Its that simple
A). Diameter is the answer
Answer:
2p-1/p
Step-by-step explanation:
The first point is (-6,4). The second point is (2,0). Apply the midpoint formula.
(-6+2)/2=-4/2=-2
(4+0)/2=4/2=2
The midpoint is (-2,2).
Answer: the probability of a bulb lasting for at most 552 hours is 0.953.
Step-by-step explanation:
Since the life of light bulbs are distributed normally, we would apply the formula for normal distribution which is expressed as
z = (x - µ)/σ
Where
x = the life of light bulbs in hours.
µ = mean hour
σ = standard deviation
From the information given,
µ = 510 hours
σ = 25 hours
We want to find the probability of a bulb lasting for at most 552 hours. It is expressed as
P(x ≤ 552)
For x = 552
z = (552 - 510)/25 = 1.68
Looking at the normal distribution table, the probability corresponding to the z score is 0.953
