If a= 3+√5/2 then find the value of a square+1/a square

How many heads would you expect if you flipped a coin twice? first, fill in the table below with the correct probabilities. hint: the sample space for flipping a coin twice is {hh, ht, th, tt}. a = b = c = f

Whats is the value of the variables ?

Awoman won a 4000-m race with a time of 12.089 min. what was her rate?