u2
2a
u = 30.6 correct to 3 significant figures
a = 5.2 correct to 2 significant figures
a) Calculate the upper bound for the value of D.
Give your answer correct to 6 significant figures.
(3)
The lower bound for the value of D is 88.8860 correct to 6 significant figures.
b) (i) By considering bounds, write down the
value of D to a suitable degree of accuracy.
(1)
(ii) Give a reason for your answer to part (i).
(1)
Total marks: 5