4. Andrew has two flying disks. One has a 12 cm diameter and the other
has a 24 cm diameter. Leaving the
answer in terms of r, what is the
difference in cm2 between the areas
of the two flying disks?

The academic affairs council is the highest expert body processing academic affairs, as stipulated by the university statutes. specialist aaro häkkinen (educational policy) took part in the council’s meeting. the agenda of the meeting included bachelors’ feedback, the timing of pedagogical studies, the grant system for tuition fees, the standardisation of administrative practices for internships and the situation of foreign-language and multilingual master’s programmes.

2xy/9 is the answer to this problem