Determine whether the given differential equation is exact. If it is exact, solve it. (If it is not exact, enter NOT.) x2y3 − 1 1 + 9x2 dx dy + x3y2 = 0

1. the wheeling bridge in west virginia is about 307 meters long. if you walk with a stride of about meter, about how many steps would it take you to cross this suspension bridge?

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

Ammonia molecules have three hydrogen atoms and one nitrogen atom.how many of each atom arein five molecules of ammonia