Arectangular playground is to be fenced off and divided in two by another fence parallel to one side of the playground. four hundredfour hundred and eightyand eighty feet of fencing is used. find the dimensions of the playground that maximize the total enclosed area. what is the maximum area?

How many molecules are present in 3 mols of silicon dioxide (sio2)?

What is meant by the statement" the melting poin of glycerine is 13 degree celsius

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.