An observer has determined that the time headways between successive vehicles, on a section of highway, are exponentially distributed and that 65% of the headways between vehicles are 9 seconds or greater. if the observer decides to count traffic in 30-second time intervals, estimate the probability of the observer counting exactly four vehicles in an interval. (in decimal, round to the 4th decimal place)

oof tough question

step-by-step explanation:

sorry i can't ya : c gl tho

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204

30005

yes ok                                            

the first option i believe

step-by-step explanation: