Can someone help me, please!

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?

While shopping at a clearance sale, samantha finds a $60.00 dress on sale for 25% off. samantha also has a 50% off coupon. which statement correctly summarizes her savings?

Alawnmower blade has a diameter of 36 inches and spins at a rate of 60 revolutions per minute. what is the linear velocity, in inches per minute, at the end of the blade?