The formula for resonant frequency is:

Given information:

Plug in the given values to find one value of capacitance:

Plug in the given values to find the other value of capacitance:

This gives a range of 2.429 nF to 26.45 nF.
With significant figures taken into account, the range of capacitance is 2.43 nF to 30 nF.
D. descriptive because it makes more sense to me then all the others.
#10 when you added the oil to the water they did not mix together. Instead the oil created a layer on the surface of the water. This is because oil is less dense than water and so it floats
Reactivity is the ability of matter that allows it to easily chemically combine with other substances.