Can Someone help me please I don't understand

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).

Acar travels 85 kilometers per hour. what is the equivalent speed in meters per hour?

According to a survey by the beach lifeguards, there is a 25% chance that surfers will see a dolphin while surfing. which simulation could you use to answer questions about whether a surfer will see a dolphin?