What single decimal multiplier would you use to decrease by 2% followed by a 3% decrease?

Jessica is a custodian at oracle arena.she waxes 20 m2 of the floor in 3/5 of an hour. jessica waxes the floor at a constant rate.at this rate how many sqaures meters can she wax per hour

Ineed if you could explain and give me the answer you! this needs done

Asphere has a diameter of 10 in. what is the volume of the sphere?