Dintr un grup de copii, o treime participa la un concurs de schi, iar ceilalti 14 copii hotaresc doar sa i sustina Aflatii nr de copii

The width of a rectangle is 20 units. can the perimeter p of the rectangle be 64 units when its length x is 11 units? no, because p = 2x + 2(20) no, because p ≠ 2x + 2(20) yes, because p ≠ 2x + 2(20) yes, because p = 2x + 2(20)

Which situation is an example of an observational study?

Afield is shaped like the figure shown