m_avi
c'est la vie
like reading the question then figuring out the formula to use.What are you struggling with?
like i know how to use the formula but i dunno HOW to use the formula ygwim?
e.g this question. You have to do the formula twice for b) except how would I know that?

i missed the lesson last week, where sir went through that (cause i was sick) and we have a quiz on this tmr
