Lisa lilly was the best runner in eighth grade. one day she ran 100m in 40 sec, 200m in 1 and 10 sec, and 200m over low hurdles olin one and a half minutes. how many more second did it take her to run the 200m over low hurdles then if did to run the 200 m dash?

Aparallel system functions whenever at least one of its components works. consider a parallel system of n components, and suppose each component works independently with probability 0.5. find the conditional probability that component n works given that the system is working

The ratios 3: 9, 4: 12, 5: 15, and 6: 18 are a pattern of equivalent ratios in the ratio table. which is another ratio in this pattern?

An airplane travels at an unknown elevation before it descends 3 miles to an elevation of 15 miles. find the elevation of the plane before its descen.