Find the magnitude & directionof the vector jk given point j(1,0) & k(-2,3)

Multiplying an even number of negative numbers gives an answer that is choose from:

Simplify this expression. 8x 16(x + y)

The volume of a spherical hot air balloon v(r) = 4 3 ? r3 changes as its radius changes. the radius is a function of time given by r(t) = 3t. find the instantaneous rate of change of the volume with respect to t at t = 2.