Need help with a physics questions?

Ruben

New member
1. Two spheres are cut from a certain uniform rock. One has radius 4.55 cm. The mass of the other is two times greater. Find its radius.

2.An auditorium measures 45.0 m multiplied by 25.0 m multiplied by 11.0 m. The density of air is 1.20 kg/m3.
(a) What is the volume of the room in cubic feet?
(b) What is the weight of air in the room in pounds?

if anybody could help i would appreciate it. thank you.
 
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