during a series of 100 meter races, the times of the runners are normally distributed with a mean of 12.5 and a standard deviation of 0.3 seconds. find the percent of runners that have a time between 11.6 seconds and 12.8 seconds​

In triangle abc, the length of side ab is 12 cm, the length of side bc is 5 cm, and the length of side ca is 9 cm. find the measure of angle a using the law of cosines.

1-for what value of x is line a parallel to line b 2-for what value of x is line a parallel to line b

The boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a) e = 2b - 212 b) b = 2e - 212 c) e = -2b + 212 d) b = -2e + 212