Yee Miao Ling's answer to Immanuela Asa Rahadini's Junior College 1 H1 Maths question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Yee Miao Ling
Yee Miao Ling's answer
29 answers (Tutor Details)
Pls ignore the rough working at the bottom right. :P.
This should be the exact answer. If you want it in 3s.f., input the 2nd last step into your calculator and you should get 4.07 (to 3s.f.).