Respuesta :

z is inversely proportion to x

⇒ z = k/x where k is a constant.


Find k:


Whe x = 16, z = 0.875


16 = k/0.875


k = 16 x 0.875


k = 14


Therefore z = 14/x


When x = 21, find z:


z = 14/21


z = 2/3


Answer: z = 2/3 or 0.67 (nearest hundredth)