A school cafeteria offers 3 meal options for lunch. What is the probability that the first 4 students all choose the same meal

State one method by which you can recognize a perfect square trinomial.

The moats separating people from the animals are 5 m wide for lions and 4 m wide for the elephants. if the lion’s moat is 4 m deep, how deep should the elephants’ moat be?

Need plz been trying to do it for a long time and still haven’t succeeded