h(t) = 1.4ut A raindrop is falling to the ground such that the height h is defined as a where t is measured in seconds and a is an unknown constant. What expression represents the instantaneous rate of change in height with respect to time when 9 seconds has passed? (1 point) 2.8a -9 12a2 O 2.1 0.233 cannot be determined Find the value of constant c if g' ( - ) (2 ) = 4 , where f = 2x3 + c and g = x2. (1 point) O -19.5 O -8 Oo O 6