Solve the Problem $\frac { 1 } { 4 } \mathrm {~g}$

Multiple Choice

Solve the problem.
-A particular substance decays in such a way that it loses half its weight each day. How much of the substance is left after 7 days if it starts out at 32 grams?

A) $\frac { 1 } { 4 } \mathrm {~g}$
B) $\frac { 1 } { 2 } g$
C) $2 \mathrm {~g}$
D) $4 \mathrm {~g}$