Solve Write the Answer in Scientific Notation $\frac { \mathrm { M } } { \mathrm { V } }$

Multiple Choice

Solve. Write the answer in scientific notation.
-If the density of a substance is 5.56 s 10^-3 tons per cubic foot, what would be the mass of 8.69 x 10^-7 cubic feet of this substance. (Use the formula D= $\frac { \mathrm { M } } { \mathrm { V } }$ . )

A) 4.83 x 10^-8 tons
B) 0.48 x 10^-9 tons
C) 4.83 x 10^-10 tons
D) 4.83 x 10^-9 tons