when x= -4 ,f(x)=2
Step-by-step explanation:
the coordinate in which f(x) i.e y=2 is (-4,2)
thus x= -4
68% will be 1 standrd deviation either side of the mean so a reasonable estimate will be (25*0.68) / 2 = 8.5
Answer:
Native copper is an uncombined form of copper that occurs as a<u><em> natural mineral</em></u>. Copper is one of the few metallic elements to occur in native form, although it most commonly occurs in oxidized states and mixed with other elements.
Step-by-step explanation: