Find the center of mass of a tetrahedron of density p(x,y,z) = x + y + z bounded by the X y Z coordinate planes and the plane + 7 3 175 72 7 O A. X= y = , Z= " 8 B. X= 175 54 35 y = 7 6 7 - Z= 26 9 104 27 104 + = 1. 8

During the first part of a trip, adrian drove 36 miles at a certain speed. adrian drives another 36 miles on the second part of the trip at a speed of 10 mph faster. driving time for the entire trip was 91 mins. find the rate at which adrian drove during the first part of the trip.  please help explain.

3 pipes can be used to fill up a swimming pool with water. It takes 9 mins for pipe A to fill up the pool while 6 mins for pipe B. A third pipe C, takes 4 mins to empty the pool. How long would it take to fill up the pool given these conditions?

You are driving at 60 miles per hour. If you decrease the time it takes you to travel 1 mile by 5 seconds, what is your new speed?