If gravity is the only force present, what is the total mechanical energy of a glass of milk falling off a table at a time when its potential energy is 15 J and
its kinetic energy is 12 J?
O A. 120
B. 27 J
O C. 33
O D. 153

What is the difference between regular convex and concave polygons

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.