The Half-Life of 30P Is 2 $1.60 \times 1010$ Nuclei Present Initially, How Many Remain After 10

The half-life of 30P is 2.50 minutes. If a sample of 30P has $1.60 \times 1010$ nuclei present initially, how many remain after 10.0 minutes?

A) $0.050 \times 1010$
B) $0.400 \times 1010$
C) $0.200 \times 1010$
D) $0.100 \times 1010$
E) $0.800 \times 1010$