The population of a city (in millions) at time t (in years) is P(t)=2.7e0.008t, where t=0 is the year 2000. When will the population double from its size at t=0

sorry, i can't understand your question. will later if you describe more clearly!

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solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.

step-by-step explanation:

the diver is 33 feet below the surface.

step-by-step explanation:

hope this