Element X decays radioactively with a half life of 11 minutes. If there are 180 grams of
Element X, how long, to the nearest tenth of a minute, would it take the element to
decay to 17 grams?

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

16.80 times .20= 3.36

step-by-step explanation: