(a(i))[4]
Form an equation in $x$ and show that it reduces to $x^2 - 5x - 20 = 0$.
(a(ii))[4]
Solve the equation $x^2 - 5x - 20 = 0$ using the quadratic formula. Show all your steps and give the answers correct to 2 decimal places.
(a(iii))[2]
Determine the time Alfonso needs for the 12 km run. State your answer in hours and minutes, correct to the nearest minute.
(b(i))[1]
Calculate the cheetah’s acceleration in the first 10 seconds.
(b(ii))[3]
Calculate the distance covered by the cheetah.