The First Unit of a Product Took 832 Hours to Build,and

Multiple Choice

The first unit of a product took 832 hours to build,and the learning curve is 75%.How long will it take to make the 10th unit? (Use at least three decimals in the exponent if you use the formula approach. )

A) less than 250 hours
B) from 251 to 275 hours
C) from 276 to 300 hours
D) from 301 to 325 hours
E) 325 or more hours