1. The value of a failure probability density function is 0.01 at a certain point in time. And, at that point in time, 90% (0.9) of the population has failed. What is the instantaneous hazard rate at that point in time (in decimal, not percent)?
2. A Duane model reliability growth test line fit found the natural log intercept to be 2.9, and the growth rate to be 0.35. What was the cumulative MTBF after 100 hours? Give the answer to the nearest whole number of hours.