Question: please help on these 3 thank you! A rectangular lead apron is placed over the chest of a patient while X-rays are taken in a

please help on these 3 thank you!

A rectangular lead apron is placed over the chest of a patient while X-rays are taken in a dental office. The apron measures 75.0cm by 55.0cm by 0.25cm. The density of lead is 11.3g/cm3. Calculate the mass of the lead apron (in grams): Find the thickness of a sheet of tin foil that measures 40.0cm by 40.0cm and has a mass of 35.5g. The density of Tin is 7.28g/cm2. Find the density of a spherical glass marble (in g/cm3 ) that has a mass of 2020g and a radius of 5.5cm. The Volume of a sphere can be calculated with the formula below: V=3(4r3)where=3.14159

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