The article "approximate methods for estimating hysteretic energy demand on plan-asymmetric buildings" (m. rathhore, a. chowdhury, and s. ghosh, journal of earthquake engineering, 2011: 99–123) presents a method, based on modal pushover analysis, of estimating the hysteretic energy demand placed on a structure by an earthquake. a sample of 18 measurements had a mean error of 457.8 knm with a standard deviation of 317.7 knm. an engineer claims that the meth

Aswimming pool has an input pump for filling the pool and an output pump for emptying the pool. the input pump can fill the pool in 3 hours, and the output pump can drain the pool in 5 hours. as you go to bed, the pool is full, but a neighbor’s kid turns on the output pump. at midnight, you awake to find the pool half empty. immediately, you turn on the input pump, but you are sleepy and forget to turn off the output pump. at what time will the pool become full?

The lengths of nails produced in a factory are normally distributed with a mean of 4.91 centimeters and a standard deviation of 0.05 centimeters. find the two lengths that separate the top 4% and the bottom 4%. these lengths could serve as limits used to identify which nails should be rejected. round your answer to the nearest hundredth, if necessary.

If x = -2, then x 2-7x+10 equals a. 0 b.20 c.28