A company manufactures a new type of LED light bulb. The lifespans of these light bulbs, in hours, are a continuous random variable with probability density function f(x)=0.0008−0.00000032(x−14000) from 14,000 to 16,500 hours. Use Excel to find the probability that a randomly selected LED light bulb will have a life span between 15,500 and 15,800 hours. Use an interval width of 10.

the answer is c)8

step-by-step explanaction:

. + λrh() e 1 1 2 4 4 4 4 4 3 4 4 4 4 4 + th−1(− s(x)2 dx ω + λrh−1() e 2 1 2 4 4

step-by-step explanation:

given : the shape of his satellite can be modeled by   where x and y are modeled in inches.

now,the given equation   is a equation of parabola.

here, coefficient of x is positive, hence the parabola opens rightwards.

on comparing this equation with standard equation , we get

in standard equation, coordinates of focus=(0,m)

thus for given equation coordinates of focus=(0,1.5)

step-by-step explanation: