A boy on a bicycle increases his velocity from 5 m/s to 20 m/s in 10 seconds. What is the acceleration of the bicycle?

Could someone me find the answer to this problem.

At an oceanside nuclear power plant, seawater is used as part of the cooling system. this raises the temperature of the water that is discharged back into the ocean. the amount that the water temperature is raised has a uniform distribution over the interval from 10° to 25° c. what is the standard deviation of the temperature increase?

What are two different ways you could find the value of a? explain these methods.