Keiko bought a desk on sale for $663. This price was 15% less than the original price. What was the original price?

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

Use circumcenter theorem to solve for the given values

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.