Simple interest is computed as the:
a) interest rate times the difference between the initial investment and any previous interest.
b) interest rate times the initial investment only.
c) interest rate times any previous interest.
d) interest rate times the sum of the initial investment plus any previous interest.

In the given figure ar(adf) =ar(cda) and ar(cdf) = ar(cdf). show that abdc and cdfe are trapeziums.

Four airplanes carrying a total of 400 passengersarrive at the detroit airport. the airplanes carry, respectively,50, 80, 110, and 160 passengers.a) one of the 400 passengers is selected uniformly at random.let x denote the number of passengers that were on theairplane carrying the randomly selected passenger. find var(x)for x as given in the problemb) one of the 4 airplane drivers is also selected uniformly atrandom. let y denote the number of passengers on the chosen driver’s airplane. find var(y) for y as given in the problem

Atemperature of 1.64◦f corresponds to answer in units of ◦c.