The First Unit of a Product Took 832 Hours to Build

Multiple Choice

The first unit of a product took 832 hours to build, and the learning curve is 70%. 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