Find the mass and the center of mass of the solid E with the given density function $ \, \rho (x, y,z). $ E is the tetrahedron bounded by the planes $ x=0,\, y=0,\, z=0,\, x+y+z={\color{red}3}; \, \rho (x, y,z)={\color{red}2} y. $

James adds two numbers a + b. sally adds the same two numbers but reverse the order b + a what property of addition assures us that james and sally will get the same sum

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. what distance from city a is the point where the truck and the car will meet?

Find the actual dimensions of the box. the side length are in meters and integers. the surface area of the box is 104 m2 and volume of the box is 60 m3.