If an average hard drive had a capacity of 0.1 TB in 2000, and average hard drive capacities double every 5 years, what will be the average hard drive capacity in 2050?  Choose the correct answer:
A) 256
B) 512
C) 768
D) 1024
E) 1536

Rationale: "0.1 * 2 ^ 10 = 0.1 * 1024 = 102.4 the answer is d ."
Answer: D