Without any passengers, an aeroplane has a mass of 4200 kg. The plane has capacity to carry 120 passengers, and when there are 40 passengers on the plane, the total mass of the plane and passenger is 7480 kg. a) calculate the mean mass of passenger b) Hence, write an expression for un that gives the total mass of the plane and passengers when there are n passengers on board c) state the values of n for which your model is valid

amount of oatypop that contains the prize = 40%

amount   of oatypop which doesn't contain the prize = (100-40)=60%

probability that hannah will win a prize

    = s +f s +f f s+ff   f s+ff f f s+ infinity.where f= failure,s= success

=   or 60%

probability that hannah only has to buy 3 or less boxes before getting a prize= (s) and ( f s) and (ff s) and (f f f s)

        = = 87.04 %  

step-by-step explanation:

13cm

step-by-step explanation:

(apex)

let y equal to

the total fare and x is the mile of taxi ride. so the equation is

y = 0.55x + 1.75

since susie has

$10 to spend for a taxi cab, so he can have

10 = 0.55x +

1.75

x = 15 miles of

taxi ride

so the system of

inequality is

10 < 0.55x +

1.75

x > 2